烧结助剂LBZ对CaO-La_2O_3-TiO_2微波介质陶瓷掺杂改性研究  

A Case Study on the Microwave Dielectric Properties of CaO-La_2O_3-TiO_2 Ceramics by LBZ Additives

作　　者：邹蒙莹[1] 李恩竹[1] 王京[1] 张树人[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《压电与声光》2016年第1期137-140,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金青年基金资助项目(51202021)

摘　　要：采用La2O3-B2O3-ZnO(LBZ)玻璃掺杂钙钛矿系CaO-La2O3-TiO2(CLT)微波介电陶瓷。运用XRD、SEM和微波介电性能测试等手段,研究了LBZ掺杂对样品烧结性能及微波介电性能的影响。结果表明,在CLT陶瓷中添加LBZ,有效促进CLT陶瓷烧结,使得CLT的烧结温度由1 350℃降低到950℃以下,同时保持较好的介电性能。当LBZ的质量分数为3%时,样品在950℃保温4h后烧结致密,并获得最佳微波性能,即介电常数εr=103.12,品质因数与频率的乘积Q×f=8 826GHz(f=3.03GHz),频率温度系数τf=87.52×10-6/℃。The La2O3-B2O3-ZnO（LBZ）glass deped CaO-La2O3-TiO2（CLT）microwave dielectric ceramics of perovskite system were synthesized by the traditional solid-state reaction method.The effects of LBZ glass doping on the sintering character and electric properties of the samples were studied by using XRD,SEM and the microwave dielectric properties measurements.The results show that adding LBZ in the CLT ceramic will effectively promote the sintering,andcan significantly reduce the sintering temperature from 1 350 ℃ to lower than 950 ℃ while maintain good dielectric properties.When the mass fraction of LBZ reaches to 3%,and the sample pellets were sintered at temperatures at around 950℃for 4h,the sample shows the best microwave performances as follows：εr=103.12,Q×f=8 826GHz（f=3.03GHz）,τf=87.52×10-6/℃.

关 键 词：CaO-La2O3-TiO2(CLT) La2O3-B2O3-ZnO(LBZ) 微波陶瓷 介电性能 

分 类 号：TM28[一般工业技术—材料科学与工程] TN384[电气工程—电工理论与新技术]