原料种类和预烧温度对Ba_(2)Ti_(9)O_(20)微波陶瓷烧结特性、相结构、微观形貌以及介电性能的影响  

Eff ects of Raw Material Type and Pre-sintering Temperature on Sintering Characteristics,Phase Structure,Micromorphology and Dielectric Properties of Ba_(2)Ti_(9)O_(20)Microwave Ceramics

作　　者：肖亚奇 黎洪天 张海林 李青 戴正立 周焕福[1] Xiao Yaqi;Li Hongtian;Zhang Hailin;Li Qing;Dai Zhengli;Zhou Huanfu(School of Materials Science and Engineering,Guilin University of Technology,Guangxi,541004;Guiyang Shunluo Xunda Co.,Ltd.,Guizhou,550014)

机构地区：[1]桂林理工大学材料科学与工程学院,广西541004 [2]贵阳顺络迅达有限公司,贵州550014

出　　处：《当代化工研究》2022年第22期5-9,共5页Modern Chemical Research

基　　金：国家自然科学基金项目“LTCC滤波器用MgO-B2O3二元体系低介、高Q微波介电材料的成分设计、缺陷调控与性能研究”(项目编号:61761015);贵州省科技计划项目“基于LTCC电感器/滤波器的超薄型MLCC用氧化铝和钛钡系陶瓷材料示范与推广”(项目编号:黔科合成果〔2021〕一般123)。

摘　　要：本文系统研究了TiO_(2)晶型、纯度以及预烧温度对Ba_(2)Ti_(9)O_(20)(B_(2)T_(9))微波陶烧结特性、相结构、微观形貌以及瓷微波介电性能的影响。XRD结果表明,以BaCO_(3)和纯度为0.9998的锐钛矿TiO_(2)为原料,1050℃预烧,1300℃烧结可以获得纯相的B_(2)T_(9)陶瓷。SEM表明,上述B_(2)T_(9)陶瓷的晶粒大小均匀,晶界清晰,结构致密性好,陶瓷样品具有最优的综合性能:ρ=4.49g/cm^(3),ε_(r)=34.9,Q×f=42598GHz,τ_(f)=-3.42ppm/℃。In this paper,the effects of TiO_(2) crystal type,purity and prefiring temperature on sintering characteristics,phase structure,microstructure and microwave dielectric properties of Ba_(2)Ti_(9)O_(20)(B_(2)T_(9)) microwave ceramics were systematically studied.XRD results show that B_(2)T_(9) ceramics with pure phase can be obtained by pre-firing at 1050℃and sintering at 1300℃with BaCO_(3) and anatase TiO_(2) with purity of 0.9998 as raw materials.The SEM results show that the grain size of B_(2)T_(9) ceramics is uniform,the grain boundary is clear,the structure is compact,and the ceramic sample has the best comprehensive performance:ρ=4.49 g/cm^(3),ε_(r)=34.9,Q×f=42598 GHz,τ_(f)=-3.42 ppm/℃.

关 键 词：微波介质陶瓷 Ba_(2)Ti_(9)O_(20) 不同晶型 不同纯度 

分 类 号：TQ174[化学工程—陶瓷工业]