Novel Series of Low‐Firing Microwave Dielectric Ceramics: Ca5A4(VO4)6 (A2+ = Mg, Zn)
Novel Series of Low‐Firing Microwave Dielectric Ceramics: Ca5A4(VO4)6 (A2+ = Mg, Zn)
复制标题
DOI：
10.1111/jace.12359
复制
发表时间：
2013-06
影响因子：
3.9
通讯作者：
G. Yao;Peng Liu;Huaiwu Zhang
中科院分区：
文献类型：
--
作者：
G. Yao;Peng Liu;Huaiwu Zhang
采用传统的固相反应法制备了Ca5A4(VO4)6(A2+=镁、锌)陶瓷，并首次研究了其微波介电性能。X射线衍射分析表明，两种样品都形成了具有立方石榴石结构的纯相陶瓷。在72 5℃和80 0℃烧结的Ca5Zn4(VO4)6和Ca5Mg4(VO4)6陶瓷具有良好的微波介电性能：Er分别为11.7和9.2，Q×f分别为49 400 GHz(9.7 GHz)和53 300 GHz(10.6 GHz)，τf分别为−83和−50ppm/°C。
Using a conventional solid-state reaction Ca5A4(VO4)6 (A2+ = Mg, Zn) ceramics were prepared and their microwave dielectric properties were investigated for the first time. X-ray diffraction revealed the formation of pure-phase ceramics with a cubic garnet structure for both samples. Two promising ceramics Ca5Zn4(VO4)6 and Ca5Mg4(VO4)6 sintered at 725°C and 800°C were found to possess good microwave dielectric properties: er = 11.7 and 9.2, Q × f = 49 400 GHz (at 9.7 GHz) and 53 300 GHz (at 10.6 GHz), and τf = −83 and −50 ppm/°C, respectively.