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Enhancing Sintered Magnesia: Role of ZnO in Densification, Thermal Conductivity, and Corrosion Resistance J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-16 Si Li, Xiang Li, Ziyang Yin, Wuyang Shi, Anxiu Wang, Liugang Chen, Chengliang Ma
This study introduces a method to reduce the thermal conductivity and boost cement clinker corrosion resistance in sintered magnesia using ZnO-modified additives. Solid-solution modified sintered magnesia was prepared at 1700 °C, and the impact of ZnO on the sintering properties, room-temperature strength, thermophysical properties, and corrosion resistance was assessed. ZnO addition enhanced the densification
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Synergistic strategy for enhancing the thermoelectric properties of Bi0.5Sb1.5Te3 with excess Te through low-temperature liquid phase sintering method J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-16 Wenhao Xie, Bo Zhu, Xianke Wu, Wei Cao, Ziyu Wang
The thermoelectric properties of BiSbTe synthesized through the low-temperature liquid phase sintering (LPS) method can be significantly improved by employing a synergistic approach. During the heat treatment, excess Te undergoes self-swelling under optimal sintering pressure, facilitating the slip of matrix grains perpendicular to the applied pressure and subsequent recrystallization, leading to enhanced
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Preparation high-performance SiC ceramic reinforced with 3D hybrid graphene oxide-carbon nanotube by direct ink writing and liquid silicon infiltration J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-16 Haichao Xu, Yong Liu, Kan Wang
This paper proposes the preparation of a silicon carbide ceramic matrix composite toughened with three-dimensional graphene oxide-carbon nanotubes (3D GO-CNT) using direct ink writing and liquid silicon infiltration processes. The research focuses on the microstructure and mechanical properties of the composite, emphasizing the toughening impact of varied GO-CNT ratios. When the GO-CNT ratio was 1:2
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Probing ballistic photovoltaic currents in Bi6-xPrxTi3Fe2O18 multiferroics J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-16 Penju Zhao, Chunyan He, Yating Su, Yebin Zou, Yulong Bai, Shifeng Zhao
Magnetic field is used to explore the mechanism of ferroelectric-dynamic coupling in the photovoltaic effect, where the spin–orbit coupling gives rise to and the expansion of relaxation times for electron–hole pair recombination. Thus, phonons with spin-1 and spin-1/2 electrons can be regulated by the magnetic field, which contributes to ferroelectric photovoltaics. The ballistic photocurrents originate
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Influence of polyurethane skeleton on structural and superconducting properties of Y-123 foams J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-16 Paweł Pęczkowski, Piotr Zachariasz, Ryszard Zalecki, Jarosław Piętosa, Jan Marek Michalik, Cezariusz Jastrzębski, Michał Ziętala, Marcin Zając, Łukasz Gondek
The physicochemical properties of Y-123 superconducting foams of various topologies prepared by the top-seeded infiltration-growth (TSIG) method are discussed. During the TSIG process, precursor foams (polyurethanes with various densities, flexibilities, and skeleton types) were infiltrated with a green phase (Y-211) and thermally converted to Y-123 superconductors using NdBCO single-crystal seeds
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Stereolithography and gelcasting of Li2TiO3 block breeders with a Gyroid structure: slurry optimization and performance evaluation J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-16 Hangyu Chen, Junyi Zhou, Yudong Cao, Baoping Gong, Xiaoyu Wang, Lei Yang, Jili Cai, Chao Cai, Yusheng Shi
This study proposes porous block structures as a viable alternative to conventional pebble bed structures, aiming to overcome the structural drawbacks including low packing fractions, extensive stress concentrations, and low thermal conductivity. To validate the feasibility of the porous block structures, Gyroid LiTiO block breeders were prepared by the hybrid process of stereolithography and gelcasting
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Low infrared emissivity of a Ti3AlC2 MAX ceramic for high-temperature thermal camouflage J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-15 Xiachen Fan, Shibo Li, Weiwei Zhang, Xuejin Zhang, Junji Mou
Thermal camouflage technology can effectively hide an object by lowering its infrared emissivity and reducing its surface temperature. So far, it has been a challenge to realize thermal camouflage at high-temperatures with single material. Here, we report a TiAlC MAX phase material that exhibits excellent thermal camouflage properties from room temperature to 500 °C, and maintains a low emissivity
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Carbon contamination of elemental beta-boron promoted a stable boron carbide by spark plasma sintering J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-15 Tingwei Guo, Yixuan Hu, Simanta Lahkar, Joydip Joardar, Mingwei Chen, Kolan Madhav Reddy
The effect of carbon contamination on the elemental beta boron (β-B) from the graphite components of spark plasma sintering (SPS) was investigated. The X-ray diffraction, analytical electron microscopy (AEM) and Raman spectroscopy witnessed boron carbide (BC where x=0.05-0.35), when SPS temperature was above 1750 °C. The degree of carbon contamination became severe with increasing SPS temperature to
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A bi-phasic numerical approach for non-linear response and stiffness recovery related to residual thermal stress in UHTCMCs J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-15 Antonio Maria Caporale, Pietro Galizia, Bartolomeo Zanardi, Antonio Vinci, Diletta Sciti, Alessandro Airoldi
The tensile properties of sintered C-ZrB/SiC UHTCMCs were investigated for different lamination sequences, revealing ultimate strengths of 570MPa (0°/0°), 120MPa (0°/90°), and 40MPa (90°/90°). The results facilitated modeling the material’s non-linear tensile response, characterized by a remarkably prolonged plateau with pseudo-plastic behavior, followed by stiffness recovery before ultimate failure
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Fast pressureless sintering of highly transparent AlON ceramics by reducing Y enrichment with nano-sized granular Y2O3 as additive J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-14 Haoran Guo, Liya Ma, Yuqing Wang, Yingchun Shan, Xiaoguang Han, Jiangtao Li, Jiujun Xu
Employing nano-sized granular YO (NGY) as additive, AlON ceramics with transmittance ≥80% across wavelengths at 380-4150nm were successfully fabricated via pressureless sintering at 1880 °C for 2.5h, the dwelling duration is much shorter than the ≥7h reported in literature. The distribution of YO in starting mixtures, along with phase transformation, microstructure evolution and densification process
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Tunable and enhanced near-infrared luminescence in Nd3+ doped asymmetrical (CaxSr1-x)5(PO4)3F transparent ceramic J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-14 Yongqiang Zhang, Zhiwei Zhou, Bingchu Mei
The high optical quality Nd doped asymmetrical (CaSr)(PO)F transparent ceramics were successfully fabricated using the hot-pressing method. The phase composition, in-line optical transmittance, microstructure and fluorescence properties were discussed. The findings revealed that the Ca and Sr were dissolved in Sr(PO)F crystal cell instead of forming a new heterophase structure. The prepared ceramics
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Ultrafast high-temperature sintering and densification of ZrC-based ceramics J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-13 Bowen Zhang, Mengchen Hu, Fugang Zhong, ShengPing Zhang, ZeWei Yang, Xinchao Qiu, Jianbo Xu, Jun Ou-Yang, Yue Zhang, Benpeng Zhu, Xiaofei Yang, Shi Chen
Zirconium carbide (ZrC) ceramics are promising candidates for high-temperature structural components and nuclear reactors. However, their poor sinterability has limited widespread application. This study explored the sintering and densification of ZrC-based ceramics with graphite or BC additive using ultrafast high-temperature sintering (UHS). A nearly fully dense ZrC ceramic (> 98%) could be obtained
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Sintering simulations for ceramic multilayer laminates with paper-derived ceramics: From sintering dilatometry to anisotropic sintering simulation J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-13 Charles Manière, Jérome Lecourt, Benjamin Dermeik, Samuel Schmiedeke, Nahum Travitzky
Alumina-based multilayer laminates with layers of varied porosities and ceramic fiber reinforcements, which can be achieved by including paper-derived ceramic layers, are interesting candidates for chemically stable and thermal shock resistant materials. In order to investigate the complex sintering behavior of these laminates, the sintering of each alumina layer contained within a laminate, each one
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Wear of the ultrahard B4C–SiC–TiB2 ceramic composite in unlubricated sliding contact with ceramic counter-parts J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-13 Fernando Rodríguez-Rojas, Victor Zamora, Fernando Guiberteau, Angel L. Ortiz
The wear performance of the ultrahard BC–SiC–TiB ceramic composite was investigated in unlubricated sliding contact in various friction pairs with other ceramics of very different mechanical properties (diamond, YO-stabilised ZrO, AlO, SiN, and borosilicate glass) under otherwise identical contact conditions. It was found that this composite is, due to its ultra-high hardness (∼35(1) GPa), a promising
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Digital precision in engineered ceramics: Tailoring toughness and flexibility through interlocking strategies J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-13 H. Yazdani Sarvestani, J. Patel, A. Shashoua, H. Ravanbakhsh, S. Taheri, J. Gholipour, B. Ashrafi
Precise material architectures and interfaces can render conventional ceramics tough, deformable and damage-resistant, offering a wide range of possibilities beyond those provided by conventional ones. This study explores the mechanical properties of topologically interlocked ceramic panels by systematically varying architectural parameters (i.e., interlocking angles and building block sizes) using
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Lowering hexacelsian sintering temperature with additives: solid or liquid phase mechanisms J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-13 Arnaud Saintonge, James Braun, Julien Danet, Alexandre Allemand, Thierry Piquero, Sophie Beaudet-Savignat, Yann Lepetitcorps
The sintering temperature of an oxide/oxide composite, comprising a barium aluminosilicate (BaAlSiO or BAS) matrix reinforced with alumina fibers, is constrained to avoid a decrease in the mechanical properties of the fibers. This paper highlights the potential of sintering additives in lowering the sintering temperature of the hexagonal BAS (hexacelsian), thereby safeguarding the integrity of the
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Development of Self-Cleaning Matte Ceramics Based on Polycrystalline Hexaferrite and Its Application in Oil Removal J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-13 Adi Darmawan, Widowati, Hasan Muhtar, Desi Nur Pratiwi, Kartono, Satriyo Adhy, Purwanto, Ni Putu Muliawati, Eka Triyana
This study focused on developing self-cleaning matte ceramics based on polycrystalline hexaferrite for oil removal. The ceramics were glazed using glaze materials BaO, FeO, ZnO, and TiO with varying ZnO:TiO ratios. The aim of this research was to determine the glaze composition that was able to provide the best self-cleaning/PA removal characteristics. After calcination at 1200°C, a polycrystalline
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Sm2-xCexO3+x/2 Composite microwave dielectric ceramics with tunable τf and enhanced Q×f J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-12 Yun Sun, Jie Li, Huixing Lin, Junfeng Yang, Congxue Su, Liang Fang
Dense SmCeO ( = 0.10−0.25) ceramics were obtained by the solid-state method. Main-phase SmO with monoclinic structure and a small amount of fluorite-structured CeO were achieved. As the value increased, the significantly reduced from 18.8 ± 2.0 ppm/°C to −20.3 ± 2.0 ppm/°C and the × enhanced from 21,382 ± 300 to 32,927 ± 300GHz. The variating from positive to negative was related to the increasing
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Fabrication of highly conducting undoped ZnO ceramics by flash sintering J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-12 Yihan Liang, Siqi Xiang, Xinfang Zhang
Highly conducting undoped ZnO ceramics were fabricated by flash sintering using commercial pure ZnO powder as a model system. The flash-sintered samples with diameters of 15 mm and heights of 2 mm exhibited relative densities ranging from 93.6% to 97.1% and room-temperature electrical conductivities between 205 and 590 S/cm. X-ray diffraction and Raman spectra indicated a high concentration of oxygen
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Flash sintering of lead zirconate titanate ceramics under high voltage at room temperature J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-12 Lin Niu, Xutao Han, Haotian Wang, Yang Zhou, Xuanrui Zhang, Junhao Li
Flash sintering has been applied to various ceramics since it was first reported. However, the flash sintering of lead zirconate titanate (PZT) at room temperature has not been accomplished. In this study, flash sintering of PZT piezoelectric ceramics at room temperature was realised for the first time. Subsequent to surface treatment in a low-pressure environment, the sample was flash-sintered at
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Yb0.5Ca0.75Si7.5Al4.5O1.5N14.5 α-SiAlON ceramics: A hard material with low thermal conductivity J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-12 Shijia Zhang, Jie Zhang, Fei Li, Songmo Du, Zhanglin Chen, Shuo Zhao, Dengke Zhao, Binbin Fan, Bohan Wang, Kexin Chen, Guanghua Liu
High hardness is desirable for thermal insulation materials in various applications to improve wear resistance. However, hard materials like diamond, SiN, and SiC are often accompanied by high thermal conductivity, due to their strong covalent bonds and high Young’s modulus, which increase sound velocity and benefit heat transportation. How to achieve concurrent high hardness and low thermal conductivity
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A novel spinel-type Mg3Ga2SnO8 microwave dielectric ceramic with low εr and low loss J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-12 Linzhao Ma, Guo Tian, Hongzhi Xiao, Longxiang Jiang, Qianbiao Du, Hao Li, Bin Yang
This research used the co-substitution strategy to prepare novel spinel-type MgGaSnO ceramics sintered at 1430–1510 °C. Rietveld refinement and SEM showed that the MgGaSnO ceramic had a cubic spinel structure with a space group of , where Mg1 and Mg2/Ga1/Sn1 occupy the tetrahedron and octahedron, respectively. The relative density exhibited a considerable influence on the of MgGaSnO ceramics. In addition
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Phase equilibria in the NiO-ZnO-SiO2 and PbO-NiO-ZnO-SiO2 systems J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-12 Hamed Abdeyazdan, Maksym Shevchenko, Evgueni Jak
investigation and thermodynamic modeling of the phase equilibria in the (PbO)-NiO-ZnO-SiO system has been undertaken to characterize Ni behavior in high-Zn slags. Phase equilibria data at 790-1700 °C were obtained through equilibration of synthetic mixtures in sealed silica ampoules or Pt-Ir / Au foils, rapid quenching, and electron probe X-ray microanalysis. Phase equilibria and liquidus isotherms
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Anisotropic and hierarchical biphasic nanorod ceramic aerogels with thermal radiation shielded, high strength and exceptional stability for thermal superinsulation J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-12 Zhiwei Chen, Dong Su, Wenxia Zhu, Huijie Wang, Le Xu, Xiaolei Li, Huiming Ji
The utilization of ceramic aerogels is crucial in spacecraft thermal protection systems that necessitate exceptional high-temperature stability, mechanical robustness, and low thermal conductivity. The primary challenges hindering their implementation encompass inadequate mechanical robustness and high infrared radiation transparency. Herein, a biphasic nanorod encapsulation strategy is proposed to
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Al2O3f/Al2O3 composites with high bending strength prepared via a MnO2 modified slurry impregnation method J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-11 Ruilan Dong, Zhihang Peng, Yang Xiang
The limitations of oxide/oxide ceramic matrix composites lie in the need to improve their mechanical properties. It is challenging to reconcile the conflict between matrix densification at high temperature and the potential thermal damage to fibers. The concept of using element doping to control the sintering behavior of matrix was initially applied to prepare alumina-based ceramic matrix composites
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Varying interfacial reaction patterns in (VNbTaMoW)C ceramic joints brazed with Ti-Zr-Ni-Cu filler alloy J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-11 Shiyu Niu, Zhenwen Yang, Ruijie Mu, Kongbo Sun, Ying Wang
The brazing of (VNbTaMoW)C ceramic with TiZrNiCu active filler is systematically studied. The metallurgical connection relies on two temperature-dependent patterns of interfacial reactions. At a low brazing temperature of 900°C, active Zr dominates interfacial reactions by seizing C atoms in HETMC lattice, generating a continuous (Zr, Ti, Nb)C layer and leading to the transformation of HETMC into a
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Processing of ZrO2 strengthened and toughened WC matrix composites based on ML J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-11 Jiayu Qin, Jiaqi Hui, Yingnan Zhou, Weiwei Dong, Yilan Luo, Shigen Zhu
Binderless WC matrix cemented carbide was considered a novel material with the potential to replace WC-Co cemented carbide. However, current research was insufficient to address the trade-off between strength, toughness, and strength in binderless WC matrix cemented carbide. In this work, the machine learning was employed to estimate mechanical property and optimize the composition of WC matrix cemented
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Flash sintering of potassium-sodium niobate-based piezoceramics: Refining (micro)structure for properties enhancement J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-10 Samuel López-Blanco, Fernando Rubio-Marcos, Andrea Barrón, Diego A. Ochoa, Jose E. García
Low-consumption ceramics processing routes are expected to replace conventional ones due to environmental concerns. In this context, flash sintering is garnering interest because it allows dense ceramics to be obtained in just a few minutes and at relatively low temperatures. This is particularly interesting for sintering alkaline-based compounds due to the easy volatilization of these elements. In
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Comparative study on the oxidation behavior of Si2BC3N/Ta4HfC5 ceramics at 1000 °C and 1500 °C: Microstructural evolution and kinetics consideration J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-08 Jingyi Guan, Daxin Li, Wenjiu Duan, Zhihua Yang, Dechang Jia, Ralf Riedel, Yu Zhou
The oxidation kinetics and oxide scale morphology of the SiBCN/TaHfC ceramics sintered by hot-pressing were explored at 1000 °C and 1500 °C in flowing air. Dense SiBCN/TaHfC ceramic sintered at 1900 °C with fine grain sizes shows the optimal oxidation resistance both at 1000 °C and 1500 °C. When oxidized at 1000 °C, the formation of a porous oxide layer of TaO, HfTaO and HfO containing amorphous SiO
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Evolutions of microstructural defects in high-entropy carbide ceramics under ion irradiations at room temperature J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-08 Molei Ding, Hui Zhang, Daohua Zhang, Xudong An, Jiulong Zhu, Fei Peng, Zhenggang Wu, Zijing Huang, Wangyu Hu, Tengfei Yang
This work studied and compared the evolutions of irradiation-induced microstructural defects in five high-entropy carbide ceramics (HECCs) at room temperature to reveal the irradiation resistances of HECCs and corresponding underlying mechanisms. The five HECCs exhibit high phase stabilities and no amorphization is observed up to 40 dpa. In-situ 800 keV Kr ion irradiation reveals similar evolutions
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Water vapor corrosion behaviors of Yb2SiO5-Yb2O3-Si-SiC ceramic fabricated by tape casting and reactive melt infiltration J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-07 Liang Zhou, Jianbao Hu, Yunhui Zhang, Le Gao, Wang Yuan, Han Luo, Yanmei Kan, Xiangyu Zhang, Jinshan Yang, Bin Wu, Xiaowu Chen, Shaoming Dong
To reduce the influence of TGO on EBCs performance, the YbSiO-YbO-Si-SiC ceramic was prepared by tape casting and reactive melt infiltration in this paper. During high-temperature water vapor corrosion, the ceramic formed a unique layered oxide layer structure to protect the material. On one hand, TGO is consumed by the reaction of YbO and YbSiO with SiO; On the other, the structure makes no TGO layer
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Yb2SiO5-Yb2Si2O7 gradient environment barrier coating : rational design and corrosion behavior in water vapor environment at 1300 ℃ J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-07 Shuang Yu, Guoliang Chen, Jinyu Fu, Shuqi Wang, Qiang Zhao, Yang Li, Dawei Ren, Yongchun Zou, Yaming Wang, Jiahu Ouyang, Dechang Jia, Yu Zhou
Gradient environmental barrier coatings (EBCs) were fabricated via atmospheric plasma spraying to deposit YbSiO-YbSiO onto a laser-sculpted SiC substrate, with varying mass ratios. Experimental results reveal that the gradient coating exhibited remarkable integrity, showing no signs of cracking even after exposure to 90% HO-10% O (g) water vapor corrosion at 1300 ℃ for 100h. Besides, the thickness
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Hot corrosion of Gd2M2O7 (M = Zr, Hf) thermal/environmental barrier coatings subjected to calcium-magnesium-alumina-silicate melts at 1300 and 1500 °C J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-07 Yiming Wu, Xin Zhong, Du Hong, Cui Hu, Ruihui Liang, Dong Fan, Lujie Wang, Yaran Niu, Xuebin Zheng
The new generation of T/EBCs requires their top layer materials with good resistance to severe corrosion by CMAS. Rare-earth zirconates/hafnates with pyrochlore structure are regarded as promising candidates for T/EBC. In this work, the corrosion behaviours and mechanisms of plasma-sprayed GdMO (M = Zr, Hf) coatings at 1300 and 1500 °C for 4–25 h were investigated. The GdMO coating showed good corrosion
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Microstructure modification of alumina prepared by water-stabilized plasma spraying method using Al-Cu-O reaction J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-07 Fuhai Bao, Seiji Yamashita, Hajime Daki, Keita Nakagawa, Hideki Kita
To improve the strength of AlO specimens produced using the water-stabilized plasma spraying technique (WSPSAO), this study investigates the effect of structural modification on the mechanical properties of WSPSAO using the Al-Cu-O reaction between the metal, atmospheric oxygen, and base material. A Cu-powder layer is applied to the specimen surface, melted, and oxidized at high temperatures. It penetrates
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Corrigendum to “Computational characterisation of microwave heating of fibre preforms for CVI of SiCf/SiC composites” J. Eur. Ceram. Soc. 43 (2023), 1808–1827 J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-07 Matthew T. Porter, Jon Binner, Michael K. Cinibulk, Beatriz García Baños, Kevin E. Stern, Vadim V. Yakovlev
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Machine learning prediction and experimental validation of magnetic properties of M-type hexagonal ferrites J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-06 Shifan Lu, Yingli Liu, Qisheng Yin, Jianfeng Chen, Jian Wu, Jie Li, Pengjie Zhang, Zhicong Chen
M-type hexagonal ferrites have received widespread attention for their excellent magnetic properties, but studying the intricate interplay between their composition, process and magnetic properties has long been a puzzling task. The advent of machine learning offers a promising example for accelerating the discovery of connections between them. In this work, we trained five machine learning regression
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Pressureless sintered lithium disilicate glass-ceramics: influence of particle size and crystallization state J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-06 Manuel Fellipe Rodrigues Pais Alves, Claudinei dos Santos, Susana M. Olhero, Maria Helena Figueira Vaz Fernandes
The pressureless sintering process is essential to densify near net shaped parts with good shape fidelity. In this work, the impact of the particle size distribution and crystallization state on the processing and properties of final sintered multicomponent lithium disilicate (SiO-LiO-KO-PO-AlO-ZnO) was evaluated. Higher densification was achieved by pressureless sintering at lower temperatures for
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Enhanced comprehensive performance of Y2O3-Al2O3-SiO2 glass filler for SiC brazing by Li2O additive J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-06 Jiasheng Liu, Jiawei Bai, Lili Xing, Decai Ma, Zhou Zhou, Jincheng Lin, Weiqi Yang
Effects of LiO additive on the network structure, crystallization behavior, thermal expansion properties and wettability of YO-AlO-SiO glass were investigated. The results showed that LiO could depolymerize the network structure, decreasing the characteristic temperatures of glass. The coefficient of thermal expansion of glasses varied from 5.09×10 K to 8.03×10 K by changing the LiO addition and heat
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Liquid-phase shear exfoliation combined with hydrothermal processing for the preparation of graphene nanosheet/AlOOH nanofiber composite powder to enhance high-temperature performance of MgO-carbon castable J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-06 Junyi Lv, Hongjuan Duan, Yage Li, Ziyu Li, Guodong Yang, Tao Li, Shaowei Zhang, Haijun Zhang
Flake graphite (FG) poses challenges for incorporation into castables due to its hydrophobic nature. In this paper, a strategy combining liquid-phase shear exfoliation (LPSE) with hydrothermal processing was proposed to produce hydrophilic graphene nanosheet/AlOOH nanofiber (GN/ANF) composite powders to address this issue. Under optimal shear exfoliation conditions, the yield of graphene nanosheets
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Giant piezoelectricity of PNN-PIN-PT ceramics via domain engineering J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-06 Wei Peng, Bin Wang, Jianglei Chang, Zhen Liu, Genshui Wang, Shuxiang Dong
The ferroelectric domain plays an important role in determining the piezoelectric performance of ferroelectric ceramics. Herein, LiNbO (LN) is used as an additive to tune the ferroelectric domain of 0.49Pb(NiNb)O-0.2Pb(InNb)O-0.31PbTiO (PNN-PIN-PT) ceramics. PNN-PIN-PT-0LN ceramic exhibits the ordered tetragonal phase (90 °) domain wall and rhombohedral phase (71 ° and 109 °) domain wall. Incorporating
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Ablation behavior of gradient ceramic-polymer composites in wind tunnel environment J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-06 Hu Zhaocai, Fan Yang, Bin Liu, Shixun Wang, Qun Wang, Geping Kuang, Weihua Xie, Songhe Meng
Ceramic matrix composites are desirable for applications in extreme environments due to the excellent ablation resistance, but few ceramic materials can exhibit a matched load bearing capacity currently. The technological potential of functionally graded materials, such as improved ablation resistance and enhanced load-bearing capacity, has opened up the feasibility for designing highly efficient thermal
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Preparation of h-BN/SiCO ceramic matrix composites with high thermal conductivity and strength by vat photopolymerization 3D printing J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-06 Nannan Zhu, Yongzhao Hou, Lijuan Zhang, Guangwu Wen
In order to improve the performance of polymer-derived ceramics and expand its application field, the formulation of the photosensitive resin was further optimized and on the basis of modification, the two-dimensional filler -BN was introduced in this paper. It was found that both the content of PVSA in the photosensitive resin and the introduction of -BN had remarkable impacts on the properties of
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Polymer-derived Biosilicate-C composite foams: in-vitro bioactivity, biocompatibility and antibacterial activity J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-06 Fulden Dogrul, Qaisar Nawaz, Hamada Elsayed, Liliana Liverani, Dušan Galusek, Enrico Bernardo, Aldo R. Boccaccini
Biosilicate/carbon composites were fabricated in the form of highly porous foams by the polymer-derived ceramic route, and their biological response was analysed. Two different commercial silicone polymers (a poly-methyl-siloxane, MK, and a polymethyl-phenyl-silsesquioxane, H44) were considered as a silica source, mixed with active fillers yielding NaO, CaO and PO. The samples were heat treated either
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Enhanced efficiency and thermal performance of multistage gradient doping Ce:YAG transparent ceramics for laser lighting J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-05 Cong Wei, Jian Kang, Cen Shao, Pengfei Sang, Tianyuan Zhou, Mingzhou Li, Fan Qiu, Baolin Jiang, Rongyu Xu, Wieslaw Strek, Hao Chen, Zhiru Ren, Le Zhang
The key to realizing the applications of ceramic based laser lighting devices depends on the heat management capability of color converters. In order to sufficiently absorb the blue light and smoothen the temperature gradient of luminescent ceramics, multistage gradient doping Ce:YAlO (Ce:YAG) transparent ceramics (TCs) with five different concentrations were designed, including 0.01 at%, 0.05 at%
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Near-room-temperature fabrication of dense BaZrO3 ceramic via acid–base chemical densification J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-05 Yuki Yamaguchi, Hiroyuki Shimada, Katsuhiro Nomura, Yasunobu Mizutani, Woosuck Shin, Hirofumi Sumi
A novel process to fabricate dense ceramic bulk of BaZrO perovskite oxide without firing was established. Although, BaZrO conventionally requires a sintering temperature of 1600 °C for densification, a relative density of 90% can be obtained via an acid-base chemical densification (ABCD) at 150 °C. In this process, a dense ceramic bulk body is fabricated through the acid–base reaction between the precursor
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The role of Ca/Zr ratio on the local structure and phase transitions in lead-free (Ba,Ca)(Zr,Ti)O3 J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-05 David K. Dobesh, Ahmed Gadelmawla, Hidetoshi Miyazaki, Manuel Hinterstein, Koji Kimura, Juliana G. Maier, Semanti Banerjee, Omar Zeair, Sharly C. Mehta, Lucas Lemos da Silva, Neamul H. Khansur, Koichi Hayashi, Dominique de Ligny, Kyle G. Webber, Maria Rita Cicconi
In this study, the structural phase transitions are investigated as a function of composition and temperature for polycrystalline (BaCa)TiO-(1 − )Ba(ZrTi)O ( = 0.40, 0.45, 0.50, 0.55, and 0.60) through a combination of Raman spectroscopy, synchrotron X-ray diffraction, and dielectric spectroscopy. The aim is to gain insight into the complex phase boundary region responsible for the excellent electromechanical
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Enhanced temperature stability in AgNbO3 lead-free antiferroelectric ceramics through texture engineering J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-02 Zhengu Chen, Meng Liu, Xiafeng He, Zhenyong Cen, Qin Feng, Fujita Toyohisa, Nengneng Luo
Lead-free dielectric materials with excellent temperature stability are critical to meet ever-increasing demands for practical energy storage applications. Herein, good temperature stability was achieved in AgNbO (AN) antiferroelectric ceramics through texture engineering by using NaNbO (NN) as template. The 3% <001>-oriented NN modified AN (AN-3NN) textured ceramic showed an optimized grain orientation
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Rapid and cost-effective fabrication of SiC from Si scrap through flash sintering J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-02 Sangha Shin, Kati Raju, Nafees Hassan, Hyun-Kwuon Lee, Jaehun Cho
A rapid, cost-effective and eco-friendly approach for fabricating SiC using Si particles derived from Si scrap is highly recommended from both economic and environmental standpoints. Herein, we demonstrate the fabrication of β-SiC effectively in argon atmosphere at 1500°C by utilizing combustion synthesis followed by flash sintering in a single-step experiment for the first time. Synthesis of β-SiC
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Sintering temperature, microwave dielectric properties and structural characteristics of Li2Zn6MgTi6O20 ceramic with high configuration entropy J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-02 Qianbiao Du, Jianhong Duan, Linzhao Ma, Longxiang Jiang, Hao Li
The novel spinel LiZnMgTiO ceramic with high configuration entropy was synthesized using the traditional solid-state method. Analysis from X–ray diffraction, transmission electron microscope, and Raman spectra demonstrates a disordered state in LiZnMgTiO (-3). This dense ceramic exhibits excellent microwave dielectric properties at 1240 °C: = 18.01 ± 0.2, × = 98,450 ± 3,000 GHz (at 9.17 GHz), and =
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A novel formation mechanism: One-step synthesis of high-purity MAX phase bulk via enlarged reaction depth J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-02 Ang Xu, Ruoqi Wang, Zhangcan Yang, Heping Li, Jinping Suo
The synthesis of high purity MAX phase bulk still faces a big challenge. In this study, we fabricated 98 vol% MAX phase bulk doped with AlO nanoparticles through spark plasma sintering by using larger size TiAl powders (particle size ∼100 μm) for the first time, in which 91 vol% TiAlN was the dominant component. The phase transition mechanism for TiAlN was deeply revealed by both experiments and theoretical
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Performance of Ce:YAG-MgO composite ceramics as high-power LED phosphor densified by non-reactive sintering J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-03-01 Akio Ikesue, Yan Lin Aung, Sawao Honda, Yuji Iwamoto
A novel white light converter has been successfully synthesized using a non-reactive sintering process to afford a fully densified Ce:YAG-MgO composite ceramic phosphor with high wavelength conversion efficiency under excitation at 450 nm. The composite obtained by HIP (hot isostatic pressing) treatment at 1080 ºC has no residual pores and the XRD (X-ray diffraction) analysis shows that there are no
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Realizing excellent electromechanical coupling performance in BiScO3-Bi(Zn2/3Nb1/3)O3-PbTiO3 ternary high-temperature perovskite ceramics J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-28 Xiaole Yu, Shihua Jiang, Kaibiao Xi, Wenlong Xu, Mupeng Zheng, Mankang Zhu, Yudong Hou
Large piezoelectric voltage coefficient () and figure of merit () are the key parameters of perovskite ceramics for piezoelectric sensors and energy harvesters. Here, the Bi(ZnNb)O (BZN) member with a low tolerance factor is introduced into the BiScO-PbTiO (BS-PT) perovskite high-temperature piezoelectric matrix to decouple the piezoelectric coefficient () and dielectric constant () by modulating the
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Oxidation of silicon particles suspended in a mullite matrix with dual-mode vacancy diffusion of oxygen J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-28 R, o, y, , M, ., , S, u, l, l, i, v, a, n
Mullite bond coats filled with silicon particles have recently been proposed for the next generation of environmental barrier coatings (EBC). The sacrificial oxidation of the silicon particles eliminates some of the environmental durability issues associated with traditional EBC designs. To investigate this novel design approach, a mathematical formulation and resulting numerical method have been developed
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Excellent strain and temperature stability in PNT-PZT multilayer textured ceramics J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-27 Lang Bian, Qian Wang, Shuai He, Jie Wu, Kai Li, Yingchun Liu, Bin Yang
A new ceramic system, Pb(NiTa)O-PbZrO-PbTiO(PNT-PZT), was found to be able to be textured at low temperatures (≤ 1000 °C) without the addition of sintering aids. Textured 0.24PNT-0.34PZ-0.42PT ceramics with different template contents were successfully prepared at 1000 °C using BaTiO platelets as templates. The phase structure, microstructure, electrical properties and strain-temperature stability
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Microstructures and interfacial behavior of Ag-CuO/AlN system by air wetting and brazing: Experiments and first-principles calculations J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-27 Qinhan Guo, Shunjian Xu, Xiangzhao Zhang, Xinyi Gui, Yudi Qiu, Ziyi Guo, Yin Zhou, Hao Wan, Guanjun Qiao, Guiwu Liu
Reactive air wetting and brazing of AlN ceramic were performed using Ag-(020)at%CuO fillers. The wettability, joint mechanical properties and microstructural evolution were investigated, and the related surface energies, interfacial stability and electronic properties of Ag-CuO/AlN system were evaluated comprehensively by density functional theory (DFT) calculations. With the CuO content increasing
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Rapid manufacture of sodium polyaluminate electrolyte ceramics for solid state batteries via direct ink writing J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-24 Athanasios Goulas, Dongrui Xie, George Gatzoulis, Sina Saremi-Yarahmadi, Bala Vaidhyanathan
Solid-state electrolyte structures using sodium polyaluminate ceramics, have been fabricated for the first time using direct ink writing; a material extrusion-based additive manufacturing process. A series of test samples were prepared using a high solids loading (80 wt%; 51.2 vol%) ceramic paste formulations with suitable rheological characteristics for 3D printing. Following optimum densification
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High-entropy boride-carbide based composite prepared by reactive spark plasma sintering J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-24 Zi-Jian Huang, Jia-Pei Chen, Yu Tian, Liang Xu, Wei-Ming Guo, Hua-Tay Lin
(HfZrTaNbTi)C-(HfZrTaNbTi)B-SiC (HEBC-SiC) and (HfZrTaNbTi)B-SiC (HEB-SiC) high-entropy boride-carbide composites were prepared by reactive spark plasma sintering with high-entropy carbides, BC and Si as starting materials. Compared to monolithic (HfZrTaNbTi)C ceramics, both HEBC-SiC and HEB-SiC samples exhibited lower porosity and finer grain size due to mutual phase pinning effect. Also, the HEBC-SiC
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Determination of short carbon fiber orientation in zirconium diboride ceramic matrix composites J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-23 Laura Silvestroni, Andreas Kupsch, Bernd R. Müller, Alexander Ulbricht, Frank Wieder, Tobias Fritsch, Diletta Sciti, Giovanni Bruno
In fiber-reinforced components, the fiber alignment and orientation have paramount influence on the thermo-mechanical properties of the resulting composite, for both short and continuous fiber. Here we present the case of an ultra-refractory matrix intended for extreme environment applications, ZrB, reinforced with 20 vol% and 50 vol% short carbon fibers. In both cases, fibers tend to align perpendicular
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Effects of Ge4+ substitution on the crystal structure and microwave/terahertz dielectric properties of diopside ceramics J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-23 Yutian Lu, Weijia Guo, Chongyang Zhang, Zhenxing Yue
The rapid development of fifth/sixth-generation (5 G/6 G) telecommunication technologies has led to increased demands for silicate ceramic materials. In this work, Ge-substituted diopside, CaMgZnSiGeO (CMZSG, = 0.0–2.0) ceramics were synthesized via the conventional solid-state method. All samples were sintered densely at 1200 ℃ for 4 h. CMZSG ceramics keep a single phase with 2/ and the lattice parameters
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Synthesis, microstructure, and dielectric properties of novel dual-phase high-entropy (Ba0.2Ca0.2Sr0.2Na0.2Bi0.2)WO4 ceramics for LTCC applications J. Eur. Ceram. Soc. (IF 5.7) Pub Date : 2024-02-23 Pengchao Shao, Xinyuan Lyu, Qihui Sun, Zhaoding Lang, Jia Wang, Ruihang Li, Le Xin, Xianfu Luo, Panpan Lyu, Luchao Ren, Mingwei Zhang
Novel dual-phase high-entropy (BaSrCaNaBi)WO ceramics were designed to reduce the sintering temperature and optimize the frequencytemperature coefficients of scheelite-type AWO ceramics. XRD and Rietveld refinement analyses revealed that the ceramic contained dual phases of BaWO and NaBiWO. The phases had a tetragonal structure with the I4/a space group, as verified by TEM. With increasing sintering