Preparation and Characterization of Citrate Sol-gel Derived CaLa4Ti4O15 Microwave Dielectric Ceramics
In this work hexagonal perovskite powders of CaLa4Ti4O15 were prepared by citrate sol-gel method.The calcined temperature was 1150℃,which is lower than that of the conventional solid method.Dense CLT ceramics were produced at sintering temperature of 1600℃.The crystal structures and microstructures were investigated by XRD,TEM and SEM,respectively.Compared with samples produced by solid method,the sol-gel derived CLT ceramics exhibited a near zero temperature coefficient of resonant frequency (τf) of-6 ppm/℃,and other microwave properties,εr~ 43,Q×f~ 42000 GHz were also obtained.Moreover,the sintering temperature of the CLT ceramics could be reduced to 1400 ℃ by addition of B2O3-ZnO.
Citrate sol-gel Microwave dielectric ceramics Hexagonal perovskite
Jing Pei Zhenxing Yue Fei Zhao Wei Li Zhilun Gui Longtu Li
State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,P.R.China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
167-169
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）