ZBAS对BaAl_2Si_2O_8结构与微波介电性能的影响  

ZBAS on the Structure and Dielectric Property of BaAl_2Si_2O_8

作　　者：韩林材 丁士华[1] 宋天秀[1] 黄龙 张晓云 熊中 HAN Lin-Cai;DING Shi-Hua;SONG Tian-Xiu;HUANG Long;ZHANG Xiao-Yun;XIONG Zhong(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,成都610039

出　　处：《无机材料学报》2018年第8期883-888,共6页Journal of Inorganic Materials

基　　金：四川省特种材料及制备技术重点实验室开放课题资助项目(szjj2017-059);四川省教育厅资助项目(14ZB0126);四川省粉末冶金工程技术中心资助项目(SC-FMYJ2017-04;SC-FMYJ2017-07);国家自然科学基金(11074203)~~

摘　　要：采用固相反应工艺,按化学计量百分比BaAl_2Si_2O_8–x(Zn O-Al_2O_3-SiO_2-B_2O_3)(x=0,1%,2%,3%,4%)制备样品,研究了不同含量Zn O-Al_2O_3-SiO_2-B_2O_3(ZBAS)玻璃相对Ba O-Al_2O_3-SiO_2系介电材料显微结构及微波介电性能的影响。结果表明:添加ZBAS玻璃相可以适当降低烧结温度,促进六方钡长石转变为单斜钡长石。当x≥3%时,六方钡长石可以完全转变为单斜钡长石。随着ZBAS玻璃相含量的增多,样品的密度、介电常数(εr)、品质因数(Q×f)和谐振频率温度系数(τf)增大。在x=3%,烧结温度为1360℃时,可以获得综合性能相对较好的单斜钡长石,其介电性能:εr=6.72,Q×f=28058 GHz,τf=–29.79×10^(–6)℃^(–1)。Barium feldspar Ba O-Al2O3-SiO2 system materials have been studied widely for satellite communication, microwave substrate and packaging in recent years. BaAl2Si2O8–x（Zn O-Al2O3-SiO2-B2O3）（x=0, 1%, 2%, 3%, 4%） ceramics were prepared by solid state route. The effects of ZBAS glass on the sintering behaviour, phase composition and microwave dielectric properties of BaAl2Si2O8 were investigated. Addition of ZBAS glass can effectirely lower the sintering temperature to 1360℃ without changing phase composition of the sample and greatly propel the transition from hexacelisian to celsian. When x≥2%, the transition from hexacelisian to celsian reaches 100%. Density, dielectric constant and τf of BaAl2Si2O8-ZBAS ceramics increase with the increment of ZBAS glass in the range of 1%≤x≤4%. In addition, the resonant frequency temperature coefficient is negative. The BaAl2Si2O8-ZBAS sintered at 1360℃ obtains a high Q×f of 28058 GHz, εr=6.72 and τf=–29.79×10^（–6）℃^（–1） at x=3%. Deviations between experimental and theoretical relative permittivity of BaAl2Si2O8–x ZBAS is also discussed.

关 键 词：ZBAS玻璃相 钡长石 单斜相 介电性能 

分 类 号：TQ174[化学工程—陶瓷工业]