复合烧结助剂对Ca_(0.3)(Li_(0.5)Sm_(0.5))_(0.7)TiO_3微波介质陶瓷低温烧结与性能研究  

Research on Low-temperature Sintering and Properties of Ca_(0.3)(Li_(0.5)Sm_(0.5))_(0.7)TiO_3 Microwave Dielectric Ceramics with Composite Sintering Additive

作　　者：张斌[1,2] 李月明[1] 张华[1] 廖润华[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,景德镇333001 [2]浙江正原电气股份有限公司,嘉兴314003

出　　处：《硅酸盐通报》2010年第1期162-166,共5页Bulletin of the Chinese Ceramic Society

基　　金：江西省教育厅科技项目(GJJ08312)

摘　　要：研究了以Ca0.3(Li0.5Sm0.5)0.7TiO3(CLST-0.7)为基料,复合添加10wt%CaO-B2O3-SiO2(CBS)、4wt%Li2O-B2O3-SiO2-CaO-Al2O3(LBSCA)和0～2wt%CuO氧化物为烧结助剂的微波介质陶瓷的低温烧结行为及微波介电特性。结果表明:随着CuO添加量的增加,陶瓷体积密度、介电常数εr、无载品质因数与谐振频率乘积Qf值,都呈先增加后降低,频率温度系数τf呈降低的趋势。添加10wt%CBS、4.0wt%LBSCA和1.0wt%CuO的CLST-0.7微波介质陶瓷,在900℃烧结5h具有较佳的微波介电性能:εr=67.31,Qf=2197GHz,τf=40.28ppm/℃。The low temperature sintering process and the microwave dielectric properties of a microwave dielectric material based on Ca0.3（Li0.5Sm0.5）0.7TiO3（CLST-0.7） ceramic with 10 wt % CaO-B2O3-SiO2 （CBS） multiplicity oxide and 4 wt % Li2O-B2O3-SiO2-CaO-Al2O3 （LBSCA） glass and 0-2 wt% CuO multiplicity additives were investigated. The results indicate that with the increasing of CuO content,the bulk density,the dielectric constant εr,the product of quality factor and resonance frequency Qf value of CLST-0.7 ceramics all increase first and then decrease and the temperature coefficient of resonant frequency τf of CLST ceramics decrease. The sample of CLST with 10 wt% CBS,4.0 wt% LBSCA and 1.0 wt% CuO sintered at 900 ℃ for 5 h exhibits excellent microwave dielectric properties：εr=67.31,Qf=2197 GHz,τf=40.28 ppm/℃.

关 键 词：Ca0.3(Li0.5Sm0.5)0.7TiO3 CAO-B2O3-SIO2 Li2O-B2O3-SiO2-CaO-Al2O3 CuO 微波介质陶瓷 低温烧结 

分 类 号：TQ174[化学工程—陶瓷工业]