Li2O-B2O3-SiO2掺杂低温烧结ZnAl2O4陶瓷的微波介电性能(英文)  

Low Temperature Sinteringand Microwave Dielectric Properties of ZnAl_2O_4 Ceramics Doped with Li_2O-B_2O_3-SiO_2 Glass

作　　者：李栋[1] 李谦[1] 黄金亮[1] 顾永军[1] 胡婧雯[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《压电与声光》2014年第5期786-789,共4页Piezoelectrics & Acoustooptics

基　　金：Supported by the Natural Science Foundation of Educational Ministry of Henan Province under Contract(2009A430005)~~

摘　　要：采用固相反应法合成Li2O-B2O3-SiO2掺杂的ZnAl2O4陶瓷。研究了Li2O-B2O3-SiO2(LBS)玻璃对ZnAl2O4陶瓷微波介电性能的影响。采用X线衍射仪和扫描电镜研究其相结构与微观形貌,采用闭腔法测量其微波介电性能。结果表明:添加6wt%LBS玻璃可以使ZnAl2O4陶瓷的烧结温度由1 650℃降至1 250℃,且无第二相产生。当LBS的添加量为6wt%时,ZnAl2O4陶瓷在1 250℃烧结3h获得最佳微波介电性能:εr=7.6,Q×f=24 000GHz,τf=-58×10-6/℃。ZnAl2O4 ceramics doped with Li2O-B2O3-SiO2 were prepared by conventional solid reaction method. The effect of Li2O-B2O3-SiO2 （LBS） glass on the microwave dielectric properties of ZnAl2O4 was investigated. The phase structure and the microstructure of the ceramics were studied by X ray diffraction and scanning electron microscopic techniques. The microwave dielectric properties of the sintered samples were measured by the shielded cavity resonance method. The results showed that the sintering temperature of ZnAl2O4 ceramics with 6wt% LBS addition can be effectively reduced from 1 650℃ to 1 250℃ without second phase formation. The 6wt% LBS-doped ZnAl2O4 ceramics sintered at 1250 ℃ for 3 h have the optimum microwave dielectric properties τf=-58×10-6/℃.

关 键 词：Li2O-B2O3-SiO2(LBS) ZnAl2O4陶瓷 微波介电性能 低温烧结 

分 类 号：TN174[电子电信—物理电子学] TN6