Sintering characteristics, crystal structure and dielectric properties of cobalt-tungsten doped molybdate-based ceramics at microwave frequency
Sintering characteristics, crystal structure and dielectric properties of cobalt-tungsten doped molybdate-based ceramics at microwave frequency
复制标题
微波频率下钴钨掺杂钼酸盐基陶瓷的烧结特性、晶体结构和介电性能
DOI：
10.1016/j.jmat.2022.04.004
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发表时间：
2022
影响因子：
9.4
通讯作者：
Zhenxing Yue
中科院分区：
文献类型：
--
作者：
Jian Bao;Yuping Zhang;Haitao Wu;Yuanyuan Zhou;Zhenxing Yue
本研究采用传统固相法制备了一系列具有优异微波介电性能的ce2 [zr 1‐x (Co 1/2 W 1/2) x 3 (MoO 4) 9 (cz 1‐x (CW) x M) （x = 0.02 ~ 0.10）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在整个掺杂范围内均能形成单相三角形晶体体系。用扫描电镜观察了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，样品的增益细化。利用P-V-L理论和深入红外分析，分析了影响cz1‐x (CW) x M性能的内在因素。当x = 0.04，烧结温度为750℃时，样品的介电性能最佳，ε r = 9.95, Q·f = 80,803 GHz (9.99 GHz), τ f = - 9.10 ppm/°C。•基于P-V-L理论探讨了（Co 1/2 W 1/2） 4+取代zr4 +对材料性能的影响。•利用红外反射光谱分析了不同波数段对介电常数的贡献。•ε r = 9.95, Q·f = 80,803 GHz (9.99 GHz), τ f = - 9.10 ppm/°C时表现出优异的介电性能。
In this study, a sequence of Ce 2 [ Z r 1‐ x (Co 1/2 W 1/2 ) x 3 (MoO 4 ) 9 (C Z 1‐ x (CW) x M) ( 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 C Z 1‐ x (CW) x M 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 C Z 1‐ x (CW) x M 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 ε r = 9.95, Q·f = 80,803 GHz (at 9.99 GHz), and τ f = − 9.10 ppm/°C. • The effects of substitution of Zr 4+ by (Co 1/2 W 1/2 ) 4+ on the properties were explored based on the P-V-L theory. • The contribution of different wavenumber segments to the permittivity was analyzed by IR reflectance spectroscopy. • Excellent dielectric properties were exhibited with ε r = 9.95, Q·f = 80,803 GHz (at 9.99 GHz) and τ f = − 9.10 ppm/°C.