(1-x)Ca_5Zn_4(VO_4)_6-xCa_(0.8)Sr_(0.2)TiO_3陶瓷微波介电性能研究  

On microwave dielectric properties of (1-x)Ca_5Zn_4(VO_4)_6-xCa_(0.8)Sr_(0.2)TiO_3 ceramics

作　　者：张黄莉[1] 姚国光[1] 杨莉[1] 鲁晋涛 赵琳[1] 陈超[1] 张立鹏[1] 袁一甲 

机构地区：[1]西安邮电大学理学院,陕西西安710121

出　　处：《西安邮电大学学报》2014年第5期91-95,共5页Journal of Xi’an University of Posts and Telecommunications

基　　金：陕西省教育厅科研专项基金资助项目(14JK1675)

摘　　要：采用传统固相法制备(1-x)Ca5Zn4(VO4)6-xCa0.8Sr0.2TiO3(0.5≤x≤0.8)系陶瓷,并研究其烧结特性、晶相组成、显微组织和微波介电性能变化规律。用X射线衍射仪(XRD)和扫描电子显微镜(SEM)分析陶瓷的晶相组成和显微组织,采用闭腔法测量其微波介电性能。研究表明,随着Ca0.8Sr0.2TiO3含量增加,陶瓷的εr和τf值逐渐增大,而Q×f值逐渐减小。875℃/5h烧结0.3Ca5Zn4(VO4)6-0.7Ca0.8Sr0.2TiO3名义陶瓷具有最佳微波介电性能,即εr=13.5,Q×f=12 800GHz,τf=3ppm/℃。In this paper （1-x）Ca5Zn4（VO4）6-xCa0.8Sr0.2TiO3（0.5≤x≤0.8）ceramics are pre-pared by the conventional solid-state reaction method,and its sinterability,crystal structure,mi-crostructure and microwave dielectric properties of the ceramics are also investigated.The crystal phase and microstructure are analysed by X-ray Diffraction（XRD）and scan electronic microscope （SEM）,the microwave dielectric properties are measured with closed cavity method.Results show that theεr andτf increase,but Q×5;f value decrease with the increase in x value.The 0.3Ca5Zn4（VO4）6-0.7Ca0.8Sr0.2TiO3 nominal ceramics sinters at 875 ℃ for 5 h exhibits excellent microwave dielectric properties：εr= 13.5,Q×;f= 12 800 GHz,τf= 3 ppm/℃.

关 键 词：谐振频率温度系数 微波介电性能 Ca5Zn4(VO4)6 

分 类 号：TM534[电气工程—电器]