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Sintering characteristics, crystal structure and dielectric properties of cobalt-tungsten doped molybdate-based ceramics at microwave frequency
Journal of Materiomics ( IF 9.4 ) Pub Date : 2022-04-15 , DOI: 10.1016/j.jmat.2022.04.004
Jian Bao 1 , Yuping Zhang 1 , Haitao Wu 1 , Yuanyuan Zhou 2 , Zhenxing Yue 3
Affiliation  

In this study, a sequence of Ce2[Zr1‐x(Co1/2W1/2)x]3(MoO4)9 (CZ1‐x(CW)xM) (x = 0.02–0.10) ceramics with excellent microwave dielectric properties were obtained by the traditional solid-phase method. The crystal structure, dielectric properties, and chemical bond characters of the ceramics were characterized and analyzed. X-ray diffraction and Rietveld refinement analysis show that CZ1‐x(CW)xM could form a single-phase of the triangular crystal system in the entire doping range. The microstructure of the ceramic samples was obtained by scanning electron microscopy. The sintering temperature was reduced and the gain of the sample was refined as the increase of doping ion content. Furthermore, the intrinsic factors affecting the properties of CZ1‐x(CW)xM were analyzed by employing P-V-L theory and through in-depth infrared analysis. When x was 0.04 and the sintering temperature was 750 °C, the best dielectric properties of the samples were achieved, including εr = 9.95, Q·f = 80,803 GHz (at 9.99 GHz), and τf = − 9.10 ppm/°C.



中文翻译:

钴钨掺杂钼酸盐基陶瓷在微波频率下的烧结特性、晶体结构和介电性能

在本研究中,一系列 Ce 2 [Zr1-X(Co 1/2 W 1/2 ) x ] 3 (MoO 4 ) 9 (CZ1-X(CW) x M) ( x  = 0.02-0.10) 采用传统固相法获得了具有优异微波介电性能的陶瓷。对陶瓷的晶体结构、介电性能和化学键特性进行了表征和分析。X 射线衍射和 Rietveld 细化分析表明,CZ1-X(CW) x M 可以在整个掺杂范围内形成单相的三角晶系。通过扫描电子显微镜获得陶瓷样品的微观结构。随着掺杂离子含量的增加,烧结温度降低,样品增益细化。此外,影响 C 特性的内在因素Z1-X(CW) x M 通过采用 PVL 理论和深入的红外分析进行分析。当x为 0.04 且烧结温度为 750 °C 时,样品的介电性能最佳,包括ε r  = 9.95,Q·f  = 80,803 GHz(9.99 GHz 时),τ f  = - 9.10 ppm/° C。

更新日期:2022-04-15
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