材料科学
电介质
单斜晶系
陶瓷
结构精修
化学键
键能
密度泛函理论
热力学
晶体结构
计算化学
分子
复合材料
结晶学
有机化学
化学
物理
光电子学
作者
Jingming Huo,Chaowei Zhong,Enzhu Li,Mingxia Wang,Hongcheng Yang
标识
DOI:10.1016/j.ceramint.2022.08.026
摘要
A new temperature-stable YbTaO4 ceramic with monoclinic structure was fabricated using the traditional solid-state method. The relationship between the structure and properties was studied using Rietveld refinement and complex chemical bond theory. The change in the dielectric constant of YbTaO4 ceramics is affected by the relative density. The values of the dielectric constant obtained by complex chemical bond theory and the Clausius–Mossotti equation are consistent with the experimental results. Research based on complex chemical bond theory indicates that Ta–O bonds have the highest bond energy and bond iconicity, which have a decisive influence on dielectric polarizabilities and dielectric performance. The microwave dielectric properties of the YbTaO4 ceramic sintered at 1675 °C were obtained as follows: dielectric constant εr = 18.52, quality factor Q×f = 21928 GHz, and temperature drift τf = 1.28 ppm/°C.
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