添加玻璃料对BaSm_2Ti_4O_(12)微波介质陶瓷烧结行为和介电性能的影响  

Influence of Glass Doping on Sintering Characteristic and Dielectric Properties of BaO-Sm_2O_3-TiO_2 System Microwave Dielectric Ceramics

作　　者：刘维良[1] 刘硕琦[2] 马奔[2] 唐春宝[1] 

机构地区：[1]景德镇陶瓷学院,江西景德镇333001 [2]北京科技大学,北京100083

出　　处：《稀有金属材料与工程》2009年第A02期237-240,共4页Rare Metal Materials and Engineering

基　　金：江西省教育厅科研基金资助(GJJ08313)

摘　　要：利用固相法制备BaSm2Ti4O12(BST)微波介质陶瓷。研究了复合添加Li2CO3-B2O3-SiO2-CaO-Al2O3(LBSCA)和BaO-B2O3-SiO2(BBS)玻璃料对BaSm2Ti4O12微波介质陶瓷的烧结性能、介电性能、相组成和微观结构的影响。研究表明:复合掺杂10%LBSCA和2%～5%BBS可使烧结温度降至900℃。XRD分析表明复合掺杂两种玻璃料的BST陶瓷主晶相为BaSm2Ti4O12相,玻璃料以玻璃相的形式存在陶瓷晶粒间。复合掺杂10%LBSCA+3%BBS玻璃料的BST陶瓷可在900℃、保温2h条件下烧结致密,微波介电性能为:εr=55.63,Qf=4266GHz,τf=–13.5×10-6℃-1,这种陶瓷材料有望与纯Ag电极共烧,制作各种多层微波频率元器件。BaO-Sm2O3-TiO2 microwave dielectric ceramics were prepared by traditional solid sate reaction technique. The effects of sintering aid Li2CO3-B2O3-SiO2-CaO-Al2O3（LBSCA ） and BaO-B2O3-SiO2（BBS） on sintering characteristic, dielectric properties, phases and microstructure of BaO-Sm2O3-TiO2 microwave dielectric ceramic ware studied. The sintering temperature was decreased to 900 ℃ by doping 10% LBSCA and 2-5% BBS. The results indicate that the major phase of additives-doped ceramics is BaSm2Ti4O12 phase by XRD analysis and the additives exist in between the crystal in the form of glass phases. The ceramic of BaSm2Ti4O12＋10% LBSCA ＋ 3%BZS sintered at 900 ℃ for 2 h has the following microwave characteristics： εr= 55.63, Qf= 4266 GHz, τf= -13.5×10^-6 ℃^-1. The ceramic is promised sintered with Ag electrode and be used to prepare various multilayer microwave components and devices.

关 键 词：微波介质陶瓷 BaO-Sm2O3-TiO2系统 低温烧结 介电性能 

分 类 号：TQ174.1[化学工程—陶瓷工业]