xCaTiO_3-(1-x)LaAlO_3陶瓷微波介电性能的研究  

Microwave dielectric properties of x CaTiO_3-(1-x)LaAlO_3 ceramics

作　　者：方丹华 江娟[1] 窦占明 陆超[1] 章天金[1] 

机构地区：[1]湖北大学材料科学与工程学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2015年第3期262-265,共4页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金(11174071)资助

摘　　要：采用传统固相反应法制备x Ca Ti O3-（1-x）La Al O3（0.55≤x≤0.69）（CTLA）陶瓷,研究CTLA陶瓷的物相,微观结构及微波介电性能.结果表明,烧结温度在1 400℃时,陶瓷的微波性能最佳,介电常数在35~47之间,Q×f≥35 000 GHz.随着Ca Ti O3含量的增大,频率温度系数趋零,当x=0.67时,陶瓷具有最佳的微波性能：εr=45,Q×f=36 684 GHz,τf=6.02×10-6/℃.xCaTiO3-（1-x） LaA103 ceramics （CTLA, 0.55≤x≤0.69）were prepared by traditional solid state process. The crystal structure, microstructure and microwave dielectric properties of the prepared CTLA ceramics were investigated. The results showed that the CTLA ceramics sintered at 1 400 ℃ exhibited excellent microwave properties： the dielectric permittivity within the range from 35 to 47, Q xf≥35 000 GHz. The temperature coefficient of resonance frequency being near to zero with the increase of LaA103 molar concentration.At x=0.67 the optimal microwave properties were obtained ：εr=45,Qxf=-36 684 GHz,rr=6.02x 10-6/℃.

关 键 词：CTLA陶瓷 物相 微波介电性能 

分 类 号：TB324.1[一般工业技术—材料科学与工程]