BSNBT系微波陶瓷性能研究  

Study on the Property of Ba_4[Sm_(1-x)(Nd_(0.8)Bi_(0.2))_x]_(28/3)Ti_(18)O_(54) Microwave Dielectric Ceramics

作　　者：常耿 张树人[1] 周晓华[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

出　　处：《压电与声光》2014年第6期939-941,共3页Piezoelectrics & Acoustooptics

基　　金：中央高校基本科研业务费专项基金资助项目(ZYGX2012J035)

摘　　要：通过XRD、SEM等技术对Ba4 [Sm1-x（Nd0.8 Bi0.2）x]28/3 Ti18O54 （BSNBT,x=0.15～0.9）系陶瓷的结构组成、显微形貌、烧结温度及介电性能进行综合表征和研究.当x=0.45时,在1 320℃烧结获得了高介电常数、高品质因数及近似零谐振频率温度系数的最优微波性能：εr=90.22,Q×f=7 192 GHz,τf=-1.39μ℃-1.随着x增大,即Ba（Nd,Bi）2Ti4O12 （BNBT）相增加,陶瓷烧结温度从1 450℃降低到1 300℃,烧结特性也随之改善并得到实际应用.The composition and microstructure, sintering temperature and dielectric properties of Ba4 [Sm1-x （Nd0.8 Bi0.2 ）28/3Ti18O54 （x= 0.15~0.9） system ceramics were comprehensively characterized and studied by XRD, SEM, etc. When x=0.45, excellent dielectric properties of a high dielectric constant and temperature coefficient of resonant frequency of approximately 0 were obtained for the ceramics sintered at 1 320 ℃ ： εr = 90. 22, Q × f = 7 192 GHz, τf= --1.39 μ℃-1. With the increase of x, that is BNBT phase increase, the sintering temperature decreased from 1 450 ℃ to 1 300 ℃, the sintering characteristics was also improved.

关 键 词：微波介质陶瓷 BaO-Sm2O3-TiO2 新型钨青铜结构 高介电常数 谐振频率温度系数 品质因数 BaO-Sm2O3-TiO2 

分 类 号：TN384[电子电信—物理电子学]