CTLA陶瓷微波介电性能及烧结特性研究  

Study on the Microwave Dielectric and Sintering Properties of CTLA Ceramics

作　　者：方有维[1] 刘林[1] 庄文东 唐斌[1] 张树人[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054 [2]成都泰格微波技术股份有限公司,四川成都611731

出　　处：《压电与声光》2012年第2期288-292,共5页Piezoelectrics & Acoustooptics

基　　金：国家国际科技合作基金资助项目(0102010DFB13800)

摘　　要：采用固相反应法制备了0.65CaTiO3-0.35LaAlO3(CTLA)陶瓷,研究了CTLA陶瓷的物相组成、烧结特性及微波介电特性。结果表明,CTLA陶瓷只含有Ca0.65La0.35Al0.35Ti0.65O3主晶相,不存在第二相。烧结温度在1 380～1 450℃间,陶瓷的微波介电性能最佳,介电常数εr=44.5,频率温度系数τf≈0,品质因数与频率之积Q×f≈43 948GHz。当w(Nb2O5)=10%时能使陶瓷致密化烧结温度降到1 300℃,但微波性能变差,εr=38.3,τf=-2.8×10-6/℃,Q×f=13 260GHz。The microwave dielectric ceramics 0.65CaTiO3-0.35LaAlO3（CTLA） was prepared by solid state reaction technique.The crystal structure,sintering properties and microwave dielectric properties of the CTLA ceramics were investigated.The results showed that the CTLA ceramics only had the main phase of Ca0.65La0.35Al0.35Ti0.65O3 without a second phase.The CTLA ceramics sintered between 1 380-1 450 ℃ exhibited excellent microwave dielectric properties：εr=44.5,τf≈0,Q×f≈43 948 GHz.The additives of 10% Nb2O5 increased densification sintering temperature to 1 300 ℃ but microwave properties was variant.εr=38,τf=-2.8×10^-6/°C and Q×f=13 260 GHz.

关 键 词：微波介质陶瓷 Ca0.65La0.35Al0.35Ti0.65O3 介电常数 品质因数 频率温度系数 

分 类 号：TM534[电气工程—电器]