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Facile photodeposition Ni(OH)2 anchored ZnIn2S4 as an efficient 1D/2D heterojunctions for photocatalytic H2 evolution J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Ruolin Chen, Hongxun Zhu, Wen Liu, Difu Zhan, Qian Fu, Jiayi Tian, Yizhong Huang, Changchun Han
Increasing the active site of redox reactions on the surface of photocatalysts and accelerating the separation and transfer of photogenerated electron‐hole pairs are effective methods to improve the hydrogen evolution of composite photocatalysts. Non‐precious metal Ni photo‐deposition is anchored in situ on the ZnIn2S4 surface to generate the cocatalyst Ni(OH)2, which improves the photocatalytic hydrogen
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Advances in laser‐based manufacturing techniques for specialty optical fiber J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Pawel Maniewski, Tim J. Wörmann, Valdas Pasiskevicius, Christopher Holmes, James C. Gates, Fredrik Laurell
As demand for customized specialty fibers grows, standardized production methods face challenges. This article reviews industry standards and discusses potentially disruptive techniques that enable rapid prototyping and fabrication of optical fiber devices. Furthermore, we showcase laser powder deposition's (LPD) potential for additive manufacturing (AM) of customized glass structures. In the case
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Millimeter‐wave dielectric characteristics of Sr1−xCaxSmAlO4 ceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Xing Yu Chen, Mei Ying Liu, Lei Li, Xiang Ming Chen
Millimeter‐wave dielectric characteristrics of Sr1−xCaxSmAlO4 ceramics were investigated together with their structures. The solid solution in the space group I4/mmm was determined in the entire composition range, and the excellent microwave dielectric characteristics were not only obtained in the centimeter‐wave range but also in the millimeter‐wave range. The dielectric constant εr indicated a slight
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Structure, electric, and optical properties of single‐crystalline domain composed thin VO2 films on glass J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Jun Wang, Liping Wen, Minhua Qin, Shouqin Tian, Xiujian Zhao, Baoshun Liu
VO2 films prepared on amorphous substrates are generally nanocrystalline and have low semiconductor–metal transition (SMT) properties. The current research reported that both the undoped and Nb‐doped VO2 films, composed of differently‐orientated single‐crystalline domains, can be prepared on amorphous quartz substrates through facile annealing of sputtered precursors, with their structures, electric
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Near‐unity quantum efficiency wavelength‐tunable NIR phosphors (Sr2−yCay)Sc1−xSbO6: xFe3+ with excellent thermal stability J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Mamuhe Yeerlan, Meng Zhang, Pengpeng Dai
Fe3+ ions as near‐infrared (NIR) activators are emerging as an alternative to Cr3+.1–5 However, it is a challenge to develop Fe3+‐activated NIR phosphors featuring tunable optical properties, high efficiency, and thermal stability. Herein, we present a series of near‐unity internal quantum efficiency (IQE), wavelength‐tunable and thermal stability NIR‐emitting phosphors Sr2−yCaySc1−xSbO6:xFe3+ (S2−yCyS1−xS:xFe3+)
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The role of As ions height in AFe2As2 (A = Ba, Sr) J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Li Li, Zhihua Zhang, Ming He, Long Lin, Hualong Tao, Yan Cui, Mengxia Wang, Shiguang Li, Hongli Wang, Weifang Wang
The sensitive response of antiferromagnetic order to As ions height in pressure environment makes the reduction of As ions height beneficial for rapid suppression of antiferromagnetism. The analysis from lattice parameters and electron density indicates that As ions height has a significant impact on antiferromagnetic suppression. The interrelationship between As ions height and antiferromagnetic suppression
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Combined experimental and computational assessment of the Li2O${\rm Li}_2{\rm O}$‐La2O3${\rm La}_2 {\rm O}_3$═ZrO2${\rm ZrO}_2$ phase diagram J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Qi‐Jun Hong, Patrick D. Tepesch, Axel van de Walle
We perform an assessment of the ‐═ phase diagram using an array of computational methods to address significant gaps in available experimental data at high‐temperatures, due to lithium loss and high reactivity with most materials, which poses significant containment challenges. Free energies of the solids are calculated via the quasi‐harmonic approximation (QHA) and thermodynamic integration, based
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Glass‐ZnS:Ag scintillating composite for radiation detection J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Degui Tu, Dazhao Wang, Xunpiao Liu, Shichao Lv, Bin Tang, Zhijia Sun, Shifeng Zhou
Neutrons are widely used in national defense, security, and medical health fields. It is critical to realize neutron detection with high efficiency. The most popular neutron detection scintillators such as lithium glass and 6LiF/ZnS:Ag screen exhibit insurmountable limitations: the former usually has relatively rather low light yield and latter is opaque. In this research, we report the successful
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Thermodynamic properties of rare‐earth tantalates enhanced by high entropy design J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Wenqing Liu, Fan Peng, Yiling Huang, Wei Zheng, Xuemei Song, Yi Zeng
Rare‐earth tantalates present promise as thermal barrier coatings due to their favorable thermodynamic characteristics. To further diminish thermal conductivity, three high‐entropy tantalate samples, namely (Ce0.2Nd0.2Sm0.2Eu0.2Lu0.2)3TaO7, (Nd0.2Sm0.2Eu0.2Gd0.2Tm0.2)3TaO7, and (Ce0.2Nd0.2Sm0.2Eu0.2Dy0.2)3TaO7, denoted as HE‐1, HE‐2, and HE‐3, respectively, were synthesized in this investigation. HE‐1
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Influence of trap centers on persistent luminescence of Cr3+ or Yb3+ Co‐doped Y3Al2Ga3O12:Pr3+ ceramic phosphors J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-20 Qiping Du, Jumpei Ueda, Setsuhisa Tanabe
Lanthanide ion doped garnet is one of the representative persistent luminescence (PersL) phosphors that have been widely investigated. However, the role of the trap centers, either intentionally added co‐dopants or intrinsic defects arising during the sintering process, and their effect on the performance of PersL has not been completely elucidated, especially when they coexist. In pursuit of clarifying
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Insights into the issues during hot‐pressing and vacuum sintering of 10 mol.% CaO doped zirconia ceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-18 Jejitti Aravind Reddy, Annu Kumar Lakshya, Anirban Chowdhury
A vacuum environment is usually preferred for reducing the dwell time and sintering temperature for doped zirconia ceramics. However, for the present work with 10 mol.% CaO‐doped ZrO2 (10CaSZ) ceramics, both hot‐pressing and vacuum sintering techniques yielded ceramics with open pores (ρ ∼ 93%) and significant amounts of the deleterious monoclinic phase (50%). This is in stark contrast with the conventionally
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On the structure and properties of hydrothermally toughened soda–lime silicate float glass J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-18 Gian Domenico Sorarù, Sebastiano Mariazzi, Mario Barozzi, Roberto Canteri, Michele Cassetta, Damiano Pellegrini, Nicola Daldosso, Roberto Sennen Brusa, Mattia Biesuz
Hydrothermal treatments of soda–lime silicate glass cause a remarkable improvement in the resistance to flaw formation with an increase of the critical load to ≈1 kgf. This remarkable effect is achieved even if the reaction layer between the glass and water solution is well below 1 µm. Positron Doppler broadening spectroscopy (DBS) reveals that the hydrothermal treatment causes a drop in the free volume
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Effect of texture on ultra‐high strain behavior in eco‐friendly NBT‐0.25ST ceramics using NBT template J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-18 Ayse Berksoy‐Yavuz, Mustafa Yunus Kaya, Ezgi Yalcin, Namik Kemal Gozuacik, Ebru Mensur
<001> oriented textured (Na0.5Bi0.5Ti)O3‐0.25SrTiO3 (NBT‐0.25ST) system was fabricated using 10 mol% plate‐like NBT template particles to enhance the electrical properties. Random and textured samples were prepared by a tape‐casting method. Lotgering factor for textured sample was calculated as 88%. Dielectric values of the samples were comparable, and this means texturing using NBT samples of this
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Ca substitution in Ca1‐xSrxTi0.8Fe0.2O3‐δ perovskites for oxygen transport membranes: A promising strategy to improve CO2 tolerance J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-15 Paolo Fedeli, Veronica Nigroni, Enrico Malgrati, Angelo Cavaliere, Andrea Cammi, Francesca Drago
Oxygen transport membranes (OTMs) can be operated as efficient oxygen separators and oxygen distributors, but their diffusion is hampered by the lack of appropriate materials with sufficient chemical stability in operating conditions. Mixed ionic‐electronic conducting SrTiO3‐based perovskite are a promising option due to their remarkable resistance in reducing environments, but they are prone to degradation
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Thermochemical interactions between yttria‐stabilized zirconia and molten lunar regolith simulants J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-13 Kevin Yu, Jamesa Stokes, Bryan Harder, Lorlyn Reidy, Katherine T. Faber
Oxygen produced through in‐situ resource utilization (ISRU) is critical to maintaining a permanent human presence on the lunar surface. Molten regolith electrolysis and carbothermal reduction are two promising ISRU techniques for generating oxygen directly from lunar regolith, which is primarily a mixture of oxide minerals; however, both processes require operating temperatures of 1600°C to melt lunar
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Effects of in situ formed nanostructures on the structure and properties of C/SiOC composites J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-11 Yuhang Zhao, Lei Guo, Qingsong Ma
In this paper, Ni was introduced into the matrix of carbon fiber reinforced SiOC (C/SiOC) composites by the precursor infiltration and pyrolysis method to catalyze the generation of in situ formed nanostructures including carbon nanotubes (CNTs), turbostratic carbon, and SiC. The effect of in situ formed nanostructures catalyzed by Ni on the properties of the C/SiOC composites was investigated. The
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Ultrahigh breakdown strength of NaNbO3‐based dielectric ceramics for high‐voltage capacitor application J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-11 Qiuyu Zheng, Bing Xie, Tianyu Li, Zhiqing Li, Qingqing Wu, Yahui Tian, Zhiyong Liu, Huajie Luo
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Ultrafast discharge properties and enhanced energy density in lead‐free NaNbO3‐based relaxor ferroelectric ceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-10 Liran Yuan, Shuai Fu, Hua Hao, Xiangyu Meng, Minghe Cao, Zhonghua Yao, Hanxin Liu
NaNbO3‐based (NN) energy storage ceramics are known for exhibiting high maximum polarization (Pmax) and large recoverable energy density (Wrec). However, the huge energy loss density (Wloss) has been a limiting factor in improving energy storage performance. Therefore, a ternary system was designed to achieve both huge Wrec and efficiency (η). The combination of 0.35Bi(Zn0.5Ti0.5)O3–0.65BaTiO3 (BZTBT)
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Deciphering crystal structure of Li3Bi3Te2O12:Sm3+ phosphors with high thermal stability for plant cultivation and white light‐emitting diodes J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-10 Shigao Chen, Junzhi Che, Bin Zhao, Shulei Li, Xuemei Yao, Yue Yang, Ya Yang, Xiang Liu, Ruijin Yu
The novel orange‐red light‐emitting garnet‐type phosphors Li3Bi3Te2O12:xSm3+ (0.005 ≤ x ≤ 0.25) were first synthesized using the high‐temperature solid‐state reaction method. The phase structure was recorded with XRD. Raman spectroscopic analysis was conducted for the first time to extract detailed structural insights of the tellurate garnet Li3Bi3Te2O12:Sm3+. The characteristics of the obtained compounds
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Microporosity evolution in polymer‐derived SiOC glasses pyrolyzed in different atmospheres J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-10 Michele Cassetta, Herwig Peterlik, Thomas Konegger, Nicola Daldosso, Gian Domenico Sorarù, Mattia Biesuz
Polymer‐derived ceramics (PDCs) are a class of advanced materials obtained by pyrolysis in a controlled atmosphere of an organosilicon polymer. Their functional as well as mechanical properties originate from the peculiar nanostructures developed during the pyrolysis. Herein, we investigate the formation of transient microporosity in a model PDC (methyl‐silsesquioxane) obtained in Ar, Ar–5%H2, CO2
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Effect of B2O3/SiO2 molar ratio and B2O3 content on viscosity and structure of B2O3–SiO2–Al2O3–Na2O–TiO2 glass lubricant J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-08 Lei Cui, Wei Lv, Pei‐yuan Ni, Huailiu Wang, Ying Li
Glass lubricant with a suitable viscosity is essential for producing high‐quality titanium products by the hot extrusion process. In this study, a novel lubricant of B2O3–SiO2–Al2O3–Na2O–TiO2 (BSANT) glass was proposed, where the effects of B2O3/SiO2 molar ratio (B/Si) and B2O3 content on viscosity and structure were investigated. The results showed that the BSANT glass viscosity was gradually decreased
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Effect of calcium–magnesium–aluminum silicate composition on reaction behavior for X1‐Gd2SiO5 and X2‐Er2SiO5 environmental barrier coatings J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-08 Ruihui Liang, Xin Zhong, Du Hong, Cui Hu, Fangxia Zhao, Zhenzhong Zhang, Yaran Niu, Xuebin Zheng
Rare‐earth (RE) silicates environmental barrier coatings (EBCs) are prone to accelerate failure resulted from molten calcium–magnesium–aluminum silicate (CMAS), which presents significant challenges to the design and development of durable EBCs. In this study, X1‐Gd2SiO5 and X2‐Er2SiO5 coatings were explored on their corrosion resistance to CMAS melts with different Ca/Si ratios (1.1, 0.75, 0.64, and
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Interstitial doping of Mn4+ ions: An effective method to optimize the optical properties of TeO2 single crystal J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-08 Xu Ding, Lianjiang Tan, Fulang Deng, Lili Liu, Tian Tian, Zhifu Liu, Yaoqing Chu
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Why geopolymers and alkali‐activated materials are key components of a sustainable world: A perspective contribution J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-08 Waltraud M. Kriven, Cristina Leonelli, John L. Provis, Aldo R. Boccaccini, Cyril Attwell, Vilma S. Ducman, Claudio Ferone, Sylvie Rossignol, Tero Luukkonen, Jannie S. J. van Deventer, José V. Emiliano, Jérôme E. Lombardi
This perspective article delves into the transformative potential of alkali‐activated materials, acid‐activated materials, and geopolymers in mitigating climate change and market challenges. To harness the benefits of these materials, a comprehensive strategy is proposed. This strategy aims to integrate these materials into existing construction regulations, facilitate certification, and promote market
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Impact of MgCl2 on the mechanical properties of alite pastes at mesoscale and nanoscale J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-08 Yanjie Sun, Yong Tao, Roland J. M. Pellenq, Chi Sun Poon
While the MgCl2 mixing alite paste causes degradation of the modulus and hardness of C–S–H formed, the underlying degradation mechanism needs to be better understood. This study comprehensively analyzed the mechanical properties of alite pastes mixed with MgCl2 solutions, examining the effects at both mesoscale and nanoscale. The in situ X‐ray diffraction analysis revealed that the formation of brucite
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Improving the density functional theory prediction accuracy for elastic moduli and thermal expansion of MoAlB, Fe2AlB2, and Mn2AlB2 J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-08 Kebin Qin, Xinxin Qi, Jin Gao, Xiaodong He, Hang Yin, Weilong Yin, Guangping Song, Yongting Zheng, Yuelei Bai
The elastic moduli and thermal expansion of MoAlB, Fe2AlB2, and Mn2AlB2 are investigated by first‐principles calculations, in particular to improve the density functional theory (DFT) prediction accuracy after clarifying the critical role of their lattice constants. By calculating the lattice constants and elastic moduli using the typical exchange‐correlation functionals, the observed positive correlation
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Hardness and scratch resistance of chemically strengthened alkali‐borosilicate thin glass J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-08 Ali Talimian, René Limbach, Dušan Galusek, Lothar Wondraczek
Chemical strengthening of glass represents a standard technology for fabricating damage‐resistant protective covers. Still, little attention has been paid to modifications in the tribological properties of ion‐exchanged glass surfaces. This work reports on scratch testing of a chemically strengthened alkali‐borosilicate thin glass. Diffusive Na+/K+‐ion exchange produces a residual surface compressive
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Unveiling the organic acids with auxiliary functional groups effect on α‐hemihydrate gypsum: Ab initio calculations J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-06 Zhiting Wang, Jieshuo Wan, Xiao Zhi, Jiayuan Ye, Changcheng Li, Fazhou Wang, Neng Li
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Monodispersed hollow ceramic microspheres fabricated based on preceramic polymers and pulse‐controlled coaxial injection J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-05 Chuhui Qin, Hongli Hu, Bo‐xing Zhang
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Surface ionic coordination of Al2O3–CaO–based molten slag induced by structural relaxation J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-05 Masanori Suzuki, Yusuke Asano, Yoshiki Ishii
The surface tensions of molten oxides depend strongly on the structural relaxation of the surface region. The mechanism of surface structural relaxation for molten oxide slags is complex. The surface tension of calcium aluminate slag is minimal at an intermediate composition, although the critical reason has not been identified. Here, two novel approaches were used to evaluate the features of surface
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Aluminum nitride‐based ceramics with excellent thermal shock resistances J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-05 Zhongyan Wang, Ji Zou, Shu Cai, You Zuo, Lei Ling, Huayue Liang, Weiming Wang, Xuming Lv, Zhengyi Fu
Ceramics were susceptible to thermal shock failure. In this work, aluminum nitride‐based ceramics with excellent thermal shock resistance were developed. Thermal shock resistance was evaluated in the temperature range of 1200–1600°C by thermal cycling of 10, 20, 30, and 50 times. The phase composition, microstructure, and mechanical properties of the ceramics before and after the thermal shock were
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Synergy between Ca2+ and high ionic field‐strength cations during the corrosion of alkali aluminoborosilicate glasses in hyper‐alkaline media J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-05 Qianhui Qin, Nicholas Stone‐Weiss, Nian Shi, Pinaki Mukherjee, Jinjun Ren, Ashutosh Goel
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Effect of concentration of Er3+ on up‐conversion luminescence in NaYF4 containing oxy‐fluoride glass‐ceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-04 Zhengxu He, Yuan Gao, Jing Ren, Jiayuan Chen, Jianbei Qiu
The color of micro‐structured glass can be tuned by adjusting the cross‐relaxation between Er3+ ions through the mechanism of up‐conversion, although the range of color change is very limited. Here, we report the simple and reproducible synthesis of transparent oxy‐fluoride glass‐ceramics co‐doped with Yb3+/Er3+ by melting and secondary heat treatment. By adjusting the doping content of Er3+ ions from
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Mechanical and thermal properties for corrosion products of lutetium silicates against CMAS J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-04 Fan Yang, Yun Fan, Juanli Zhao, Yuchen Liu, Kaili Chu, Yiran Li, Wenxian Li, Bin Liu
Rare earth silicates are promising environmental/thermal barrier coating (E/TBC) materials facing severe CMAS (CaO‐MgO‐Al2O3‐SiO2) corrosion. Previous studies mainly focused on the intrinsic properties of precorrosion coatings, but there were few studies on their CMAS corrosion products that play a crucial role in the performance of coatings in postservice stage. In this work, the mechanical and thermal
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Enhancing the microwave absorption performance of graphite/Al2O3 composites through manipulating sheet resistance J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-04 Zhaoning Yang, Jing Wang, Zihao Yang, Xiaoxin Shu, Wei Ren, Jie Wang
The graphite/Al2O3 composite was prepared using plasma spray technology, the material design, experimental methods, and process flow are introduced. The microstructure, chemical composition, and complex permittivity of the composite are investigated, and its performance to absorb electromagnetic waves is studied. The mechanism of interaction between chemical composition, microstructure, complex permittivity
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Excitation‐dependent afterglow evolution based on constructing dual crystal field glass ceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-04 Panpan Li, Enhai Song, Weichao Wang, Qinyuan Zhang
Distinctive luminescent properties and excellent stability of long persistent luminescent (LPL) glass‐ceramic hold promise for anti‐counterfeiting and encryption applications. However, rational synthesis and a deep understanding of the precipitation of dual‐phase microcrystals in glass substrate to improve the encryption level remain challenging. Here, we carefully designed the components based on
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Thermal shock resistance of a novel (Gd1/6Tb1/6Dy1/6Tm1/6Yb1/6Lu1/6)2Si2O7 environmental barrier coating J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-04 Lingxuan Yan, Yin Peng, Zhixin Luo, Haoyu Wang, Ziyu Wang, Yixiu Luo, Jiemin Wang, Luchao Sun, Jingyang Wang
Multicomponent rare earth (RE) disilicates have been recognized as promising candidates for environmental barrier coatings (EBCs). In this work, a novel EBC system with (Gd1/6Tb1/6Dy1/6Tm1/6Yb1/6Lu1/6)2Si2O7 as top coat and Si as bond coat was deposited on SiC‐based substrates by atmospheric plasma spraying technology and subjected to 200 thermal shock cycles at 1350°C. The composition and microstructure
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Synthesis of ZSM‐5 zeolite from fly ash by one‐pot hydrothermal method for methylene blue removal J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-03 Wenhe Yu, Xiaowen Wu, Ruiyu Mi, Huachao Zai, Minghao Fang, Xin Min, Yangai Liu, Zhaohui Huang
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Controllable hierarchical Bi2MoO6 spheres with ferroelectric polarization enhanced photocatalytic efficiency J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-01 Kezhen Hui, Aoqi Zhou, Fanqi Dai, Weichen Zhang, Xinxin Wang, Peiyao Zhao, Wei Li, Qian Li, Longtu Li, Limin Guo, Xiaohui Wang
The fast recombination of photogenerated electrons and holes remains a major issue in hindering photocatalytic efficiency. Apart from traditional methods, such as rare metal deposition and element doping, the introduction of a built‐in electric field has been proven an efficient way in recent years. Ferroelectrics, which possess spontaneous polarization and associated polarization electric fields,
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Microscopic effect of iron dosage on the stability of Fe‐doped ettringite J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-01 Amine Bouibes, Majdouline Laanaiya, Laurie Lacarrière
One significant aspect that affects the performance of high‐ferrite cement is the incorporation of iron (Fe) atoms and its stabilization into the cement phases. However, the influence of Fe doping on the stability of key phases, particularly on the ettringite, remains largely unexplored requiring deeper insights into the fundamental mechanisms. The present study explored the stability of Fe‐doped AFt
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Foam structure–derived strong and tough alumina ceramics with fine grains and transgranular fracture J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-01 Shihui Zhao, Jianli Qiao, Guolong Sang, Xiaoqing Xi, Jinlong Yang
Controlling the preparation process is essential to ensure the quality of the ceramics. Previous research on the ceramic process concentrated on a certain part of powder synthesis, forming, or sintering. Herein, we propose a novel process, foam precursor–derived Al2O3 ceramics, to realize particle rearrangement, assembly, and sintering and find that this method has a marvelous influence on the microstructure
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Effect of iron acceptor doping and calcium donor doping in potassium sodium niobate‐based lead‐free piezoceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-01 Maryam Azadeh, Changhao Zhao, Apoorva Pawadi, Shuang Gao, Till Frömling
Lead‐free potassium sodium niobate (KNN) ferroelectrics have emerged as promising alternatives to lead‐based materials due to their reduced toxicity and sometimes enhanced properties. The opportunity to modify the ferroelectric properties by doping, nevertheless, differs from lead‐based ceramics. A much lower impact with increasing dopant concentration was observed. This study systematically investigates
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Digital light processing of TixOy@Ti/HA biomaterials by oxidation of TiH2 and dehydrogenation of TiO2@TiH2/HA precursors J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-04-01 Zhiwei Li, Qinchao Tang, Zhifeng Huang, Qiuyu Liu, Xuye Wang, Junguo Li, Guanchao Yin, Yi Bai, Fei Chen
The complex structure of Ti/HA (HA: hydroxyapatite) implants prepared by additive manufacturing technology plays an essential role in its application in bone repair. Digital light processing (DLP) is widely used to prepare bioceramics with complex structures. However, it is a challenge to prepare Ti/HA biomaterials by DLP due to the high ultraviolet (UV) absorption of Ti powder. In the present work
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The thermal debinding of soluble binders in injection molded zirconia ceramic from room temperature to 250°C J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-30 Jiacheng Zhu, Liang Qiao, Jingwu Zheng, Yao Ying, Wei Cai, Juan Li, Jing Yu, Wangchang Li, Shenglei Che
In ceramic injection molding, the conventional solvent‐debinding process encounters limitations such as solvent cost and environmental pollution. In this paper, a suitable thermal‐debinding process from room temperature to 250°C using carbon/alumina embedding powders with nano and submicron size was developed to remove the soluble binders replacing the conventional solvent debinding of injection molding
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Structure, magnetic, and electrodynamic properties of SrInxFe12‐xO4/Ni0.5Zn0.5Fe2O4 composites at low temperature J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-30 Munirah Abdullah Almessiere, Norah A. Algarou, Yassine Slimani, Denis S. Klygach, Abdulhadi Baykal, Ayse Demir Korkmaz, Tatiana I. Zubar, Maxim V. Silibin, Maxim G. Vakhitov, Anwar UI‐Hamid, Sergey V. Trukhanov, Alex. V. Trukhanov
Exchange‐coupled hard–soft bi‐magnetic ferrites can be used as isolators, microwave absorption materials, filters, hyperthermia materials, and biosensors with improved energy properties. The nanocomposites with the chemical composition SrInxFe12‐xO4/Ni0.5Zn05Fe2O4 (where x varies from 0.00 to 0.04) have the advantages of both materials: spinel and hexaferrite. The combination of Sr‐hexaferrate with
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Numerical simulation of the Ge28Sb12Se60 fiber extrusion process J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-30 L. V. Shabarova, B. S. Stepanov, Y. P. Kirillov, S. V. Mishinov, A. S. Stepanov, E. N. Lashmanov, V. S. Shiryaev
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Holistic comparison of environmental barrier coating material candidates through design of a figure of merit J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-28 Mackenzie J. Ridley, Dominic J. Pinnisi, Elizabeth J. Opila
The first figure of merit for environmental barrier coating (EBC) materials was designed through a ranking system for material properties pertaining to established EBC failure modes in service. Seven past, present, and novel EBC candidate materials were used in the figure of merit design: SiO2, Ba0.75Sr0.25Al2Si2O8 (BSAS), HfSiO4, Yb2Si2O7, Yb2SiO5, Yb2O3, and YbPO4. Utilizing compiled data from the
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Low temperature fabrication of highly dense α‐Si3N4 ceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-28 Songmo Du, Jie Zhang, Fei Li, Zhanglin Chen, Shijia Zhang, Shuo Zhao, Dengke Zhao, Binbin Fan, Kexin Chen, Guanghua Liu
Highly dense α‐silicon nitride (Si3N4) ceramics were densified at a lower temperature of 1450°C under a moderate mechanical pressure of 50 MPa from commercial α‐Si3N4 powder and with conventional Al2O3–Y2O3 sintering additives. The fabricated α‐Si3N4 ceramics exhibited a hardness of 19 GPa, which is higher than that of the β‐Si3N4 ceramics usually obtained. The effect of sintering temperature and sintering
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A super‐hard high entropy boride containing Hf, Mo, Ti, V, and W J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-23 Suzana Filipovic, Nina Obradovic, Greg E. Hilmas, William G. Fahrenholtz, Donald W. Brenner, Jon‐Paul Maria, Douglas E. Wolfe, Eva Zurek, Xiomara Campilongo, Stefano Curtarolo
Super‐hard (Hf,Mo,Ti,V,W)B2 was synthesized by boro‐carbothermal reduction and densified by spark plasma sintering. This composition was produced for the first time as a single‐phase ceramic in the present research. The optimized ceramic had a single hexagonal AlB2‐type crystalline phase with a grain size of 3.8 µm and homogeneous distribution of the constituent metals. The Vickers hardness exhibited
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Refractive index dispersion prediction for garnets (A3B2C3X12) J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-20 John W. Drazin, Randall S. Hay
A model for the refractive index dispersion of garnets was developed by extension of a model for garnet refractive indices at 589 nm wavelength. The cation and anion polarizabilities in garnets were determined as a function of wavelength from dispersion data, and fit to Sellmeier relations. Dispersion predictions were compared to measurements of refractive index between 400 and 5500 nm for 35 garnet
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High color‐purity broad orange‐red emission of Mn2+‐doped transparent phosphate glass–ceramics embedded NaYP2O7 crystals J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-19 Haozhang Liang, Xiangtao Lin, Nanshan Ma, Longqing He, Juxia Tong, Zhiwei Luo, Lingying Ye, Anxian Lu
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Densification of low‐density boron carbide by Li doping and its microstructural characterization J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-19 Chao Pan, Aiyang Wang, Wenwen Zhang, Jinyong Zhang, Weimin Wang, Fan Zhang, Zhengyi Fu
Lithium (Li)‐doped boron carbide (B4C) has generated widespread attention for its potential to enhance mechanical properties. Nevertheless, the influence of the Li solid solution on the microstructure and mechanical properties of B4C ceramics remain unclear. In this research, the microstructure of Li‐doped B4C was investigated in meticulous detail. Through X‐ray diffraction, X‐ray photoelectron spectroscopy
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Crystal structure and microwave dielectric properties of Li2(Mg1–xCux)2Mo3O12 ceramics sintered at ultra‐low temperature J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-14 Qi Yuan, Yutong Meng, Tao Wang, Wencai Hu, Sen Wang, Gaobin Liu, Qiyao Wang, Kuoming Song, He Zhao, Shuai Yan, Xin Li
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Large room temperature magnetoelectric response in quasi 1–2 nanocomposite films on mica substrate J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-14 Weijuan Pan, Yuanji Liu, Yuan Ao, Peng Zhou, Fedor Fedulov, Yuri Fetisov, Tianjin Zhang, Sainan Xing, Gopalan Srinivasan, Yajun Qi
A novel quasi 1–2 type magnetoelectric (ME) nanocomposite films composted of one‐dimensional CoFe2O4 nanofibers and two‐dimensional PbZr0.2Ti0.8O3 films on flexible mica substrate have been designed and fabricated. The ME coupling effects have been greatly enhanced due to the release of the clamping effect and the high strain transfer efficiency between the large aspect ratio of the nanofibers and
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Phase transition mechanism and long‐term stability of LiF‐assisted sintered Li2MgxZrO3+x microwave dielectric ceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-14 Xin Chu, Lin Gan, Juan Jiang, Jinzhao Wang, Tianjin Zhang
Herein, Li2MgxZrO3+x (x = 0–1) +2 wt.% LiF ceramics with a rock salt structure were prepared by the solid‐state reaction method. The phase transition mechanism was systematically investigated by X‐ray diffraction, and first‐principles calculations. With a gradual increase in MgO content, the samples underwent a monoclinic‐Li2ZrO3 to tetragonal‐Li2ZrO3 to tetragonal‐Li2MgZrO4 to cubic‐phase transition
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Effect of inert glass on the physical and mechanical properties of zirconia dental ceramics fabricated by digital light processing J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-14 Faqiang Zhang, Kesheng Zhang, Yangbo Zuo, Xia Jin, Jingzhou Yang
Zirconia dental ceramics incorporated with inert dental glass (IDG) were fabricated by digital light processing (DLP). The effects of the amount of added IDG on the physical properties and microstructure of sintered samples were investigated. Highly dense zirconia dental ceramic samples with a relative density of 98.9% were obtained by adding different amounts of IDG sintered at 1500°C. With the addition
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Influence of (Ta Nb Ti V) C powders synthesized by molten salt at low temperature on densification and properties of high entropy carbide ceramics J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-13 Hongbin An, Ruoyu Chen, Saisai Li, Lingfeng Huang, Wenbao Jia, Qianfang Wu, Aiqing Mao
Powder synthesis is crucial for achieving the densification and facilitating widespread applications of high entropy carbide (HEC). Specifically, the production of fine particle‐size powders is essential to enhance the densification of HECs. Consequently, this paper proposes the molten salt method for synthesizing HEC powders. The synthesis process successfully yielded (Ta Nb Ti V) C powders with a
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Excellent temperature stability of piezoelectric properties in PbNb2O6‐based ceramics up to 450°C J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-12 Ruoqi Jin, Xiaodan Ren, Liqing Hu, Mingyang Tang, Zhuo Xu, Yongke Yan
Dense (Pb0.92Ba0.08)Nb2O6‐xmol% MnO2 with 0.25 wt% TiO2 ceramics with a single orthorhombic phase were synthesized through a conventional solid‐state reaction method. Excellent piezoelectric performance (d33 = 90 pC/N) and low dielectric loss (tan δ = 0.5%) are achieved in Mn‐doped samples. Interestingly, the dielectric anomalies are observed in the temperature range of 300–400°C, which could be completely
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Pressure‐driven homogenization of lithium disilicate glasses J. Am. Ceram. Soc. (IF 3.9) Pub Date : 2024-03-08 Yasser Bakhouch, Silvio Buchner, Rafael Abel Silveira, Leonardo Resende, Altair Soria Pereira, Abdellatif Hasnaoui, Achraf Atila
Lithium disilicate glasses and glass–ceramics are good potential candidates for biomedical applications, solid‐state batteries, and serve as models of nucleation and crystal growth. Moreover, these glasses exhibit a phase separation that influences their nucleation and crystallization behavior. The atomistic mechanisms of the phase separation and their pressure dependence are unclear so far. Here,