CaO-B2O3-SiO2玻璃相对BaAl2Si2O8陶瓷结构与介电性能的影响  

Effects of CaO-B2O3-SiO2 Glass Phase on the Structure and Dielectric Property of BaAl2Si2O8 Ceramics

作　　者：严欣堪 丁士华[1] 黄龙 张晓云 李超 朱惠 YAN Xin-kan;DING Shi-hua;HUANG Long;ZHANG Xiao-yun;LI Chao;ZHU Hui(School of Materials Science and Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]西华大学材料科学与工程学院

出　　处：《硅酸盐通报》2019年第8期2341-2346,共6页Bulletin of the Chinese Ceramic Society

基　　金：教育部春晖计划项目(Z2011077);四川省特种材料及制备技术重点实验室开放课题(szjj2017-059)

摘　　要：采用固相反应工艺,按化学计量比在BaO-Al 2O 3-SiO 2(BAS)基料中添加不同质量分数x(CaO-B 2O 3-SiO 2,CBS)(x=0,1%,2%,3%,4%)玻璃相合成BAS陶瓷。研究不同含量的CBS玻璃相对BAS系微波介质陶瓷的结构和介电性能的影响。结果表明:CBS玻璃相能够有效促进六方相钡长石向单斜相钡长石的转变,在x=1%时,BAS六方相完全转变为单斜相,同时BAS陶瓷的烧结温度从1400℃降低至1325℃。添加适量的CBS玻璃相后,BAS陶瓷样品密度、品质因数(Q×f)值以及谐振频率温度系数(τf)得到改善。当x=1%,烧结温度为1325℃时,可获得综合性能相对较好的BAS陶瓷,其介电性能:εr=6.43,Q×f=30846 GHz,τf=-19.01×10-^6℃^-1。BaAl 2Si 2O 8-x wt%(CaO-B 2O 3-SiO 2)(x=0,1%,2%,3%,4%)ceramics were prepared by solid state route.The effects of CBS glass phase on the sintering behaviour,phase composition and microwave dielectric properties of BaAl 2Si 2O 8 were investigated with content of CBS glass increasing.The results show that the CBS glass phase can properly reduce the sintering temperature from 1400℃to 1325℃and greatly propel the transition from hexacelisian to celsian,as x=1%,all the hexacelsian were transformed into celsian.The density,Q×f value,the temperature coefficient of resonant frequency(τf)of BaAl 2Si 2O 8-x wt%CBS ceramics have been improved with the increment of CBS glass phase.The BaAl 2Si 2O 8-1wt%CBS sintered at 1325℃obtains a high Q×f of 30846 GHz,εr=6.43 andτf=-19.01×10^-6℃^-1.

关 键 词：CBS玻璃相 钡长石 单斜相 微波介电性能 

分 类 号：TQ174[化学工程—陶瓷工业]