Ca_(0.3)(Li_(0.5)Sm_(0.5))_(0.7)TiO_3微波介质陶瓷低温烧结研究  

Study on low-temperature sintering of Ca_(0.3)(Li_(0.5)Sm_(0.5))_(0.7)TiO_3 microwave dielectric ceramics

作　　者：李月明[1] 张斌[1,2] 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,江西景德镇333001 [2]浙江正原电气股份有限公司,浙江嘉兴314003

出　　处：《电子元件与材料》2009年第12期5-8,共4页Electronic Components And Materials

基　　金：江西省教育厅科技资助项目(No.GJJ08312)

摘　　要：采用固相反应法,以Ca0.3(Li0.5Sm0.5)0.7TiO3(CLST—0.7)陶瓷为基料,掺杂质量分数为10%的CaO-B2O3-SiO2(CBS)氧化物和2%～6%的Li2O-B2O3-SiO2-CaO-Al2O3(LBSCA)玻璃料为复合烧结助剂,研究了LBSCA掺杂量对CLST—0.7陶瓷的低温烧结行为及微波介电性能的影响。结果表明,复合烧结助剂掺杂促使CLST—0.7陶瓷烧结温度降低了200～300℃,并保持良好的微波介电性能。掺杂质量分数10%CBS和4%LBSCA的CLST—0.7陶瓷经950℃烧结5h后,其εr=71.84,Q·f=1967GHz,τf=41.7×10–6/℃。Ca0.3（Li0.5Sm0.5）0.7TiO3（CLST-0.7） ceramics doped with complex sintering aids containing 10% （mass fraction） of CaO-B203-SiO2 （CBS） oxides and 2%-6% （mass fraction） of Li2O-B2O3-SiO2-CaO-Al2O3 （LBSCA） frits were prepared using a solid state reaction method, and the effects of LBSCA doping amounts on the low-temperature sintering behaviors and microwave dielectric properties of CLST--0.7 ceramics were investigated. The results indicate that the sintering temperature of the CLST--0.7 ceramic still doped with complex sintering aids is efficiently decreased by 200 -300℃ and the CLST--0.7 ceramic still keeps good microwave dielectric properties. The sample of CLST--0.7 ceramic doped with 10 % （mass fraction） of CBS and 4% （mass fraction） of LBSCA sintered at 950 ℃ for 5 h possesses excellent microwave dielectric properties： εr = 71.84, Q · f= 1 967 GHz, rf= 41.7 ×10^-6/℃.

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

分 类 号：TM227[一般工业技术—材料科学与工程]