Ca_(1-x)(Li_(1/2)Sm_(1/2))_xTiO_3体系微波介质陶瓷的低温烧结研究  

STUDY ON LOW-TEMPERATURE SINTERING OF Ca_(1-x)(Li_(1/2)Sm_(1/2))_xTiO_3 SYSTEM MICROWAVE DIELECTRIC CERAMICS

作　　者：李月明[1] 张斌[1] 宋婷婷[1] 刘维良[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,江西景德镇333001

出　　处：《中国陶瓷工业》2009年第2期8-12,共5页China Ceramic Industry

基　　金：江西省教育厅科技项目(编号:GJJ08312)

摘　　要：采用传统陶瓷制备工艺,制备了添加10wt%NCB(Na2O-CaO-B2O3)复合氧化物的Ca1-x(Li1/2Sm1/2)xTiO(3x=0.700-0.875)(CLST-x)体系陶瓷,研究了添加NCB后CLST-x体系的晶相组成、显微结构、烧结性能及微波介电性能与组成关系。研究结果表明,添加复合氧化物NCB后,CLST-x体系各组成主晶相仍呈斜方钙钛矿结构,没有其它杂相。添加10wt%NCB后,CLST-x体系陶瓷均可在950℃下烧结致密,在此温度下材料具有较佳的微波介电性能,其中CLST-0.875陶瓷在950℃保温5h烧结后具有良好的微波介电性能:εr=63.6,Qf=1591GHz,τf=0ppm/℃,可满足高介多层微波器件的设计要求。Ca1-x（Li1/2Sm1/2）xTiO3 （x = 0.700- 0.875, CLST-x）microwave dielectric ceramic with 10 wt% NCB （Na2O- CaO-B2O3） additive were fabricated by traditional ceramic process. The relations among the crystal structure, microstructure, sintering behavior, dielectric properties and the composition x of CLST-x system ceramics were investigated systematically. The results indicate that the major phase of CLST-x ceramics is still orthorhombic perovskite without second phases after added 10 wt% NCB, and these ceramics all can be sintered at 950 ℃. At this sintedng temperature, these materials have excellent microwave dielectric properties. The specimen of CLST-0.875 with 10 wt% NCB sintered at 950℃ for 5 h has good performance： εr = 63.6,Qf = 1591 GHz,τf = 0 ppm/℃, which satisfy the demands of high dielectric constant and multilayer microwave components.

关 键 词：Ca1-x(Li1/2Sm1/2)xTiO3 Na2O-CaO-B2O3 微波介质陶瓷 低温烧结 

分 类 号：TQ174.1[化学工程—陶瓷工业]