(Zn_(1-x)Mg_x)TiO_3微波陶瓷系统介电性能的研究  

MICROWAVE DIELECTRIC PROPERTIES OF CERAMICS BASED ON (Zn_(1-x)Mg_x)TiO_3 SYSTEM

作　　者：王玉梅[1] 李玲霞[1] 吴霞宛[1] 林曼红[1] 于立[2] 

机构地区：[1]天津大学电子信息工程学院先进陶瓷与加工技术教育部重点实验室,天津300072 [2]天津住宅集团房地产销售有限公司,天津300100

出　　处：《硅酸盐学报》2004年第8期911-915,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金 ( 5 0 1 72 0 3 5 )资助项目

摘　　要：对 (Zn1-xMgx)TiO3 系统的微观结构和介电性能进行了研究。通过添加一定量的MgO稳定ZnTiO3 六方钛铁矿结构 ,有效抑制了ZnTiO3 分解为Zn2 TiO4 和TiO2 。同时 ,通过调整x值 (x =0 .1～ 0 .4) ,可以获得介电性能优良的微波瓷料。当x=0 .3～ 0 .3 5时 ,在 10 6 0℃烧结 ,其品质因数Q0 >2 0 0 0 0 ( 6 .5GHz) ,谐振频率温度系数τf≈ + 2× 10 - 6 /℃ ,介电常数ε =18～ 2 2。通过研究发现热处理可以改变系统微观形貌 ,其品质因数Q0 与热处理温度关系密切 ,当保温时间均为 2h时 ,随着热处理温度的升高 ,Q0 从 2 3 83 3 .93相应升高到 475 84.0 0。The microstructure and dielectric properties of (Zn1-xMgx)TiO3 system were investigated. By adding the MgO in ZnO-TiO2 system, the hexagonal ilmenite structure of ZnTiO3 was stabilized, and that the compound decomposited into Zn2TiO4 and rutile was restrained effectively. Through the x value adjusting (x=0.1-0.4), the better properties of material can be obtained. While x value is between 0.3 and 0.35, the dielectric properties of (Zn1-xMgx)TiO3 calcined at 1060°C are: quality factor Q0f+2×10-6/°C dielectric constant Ε=18-22. Results show that heat treatment can improve the microstructure of (Zn1-xMgx)TiO3, and the Q0 value is depended on the heat treatment temperature, with increasing the heat treatment temperature but holding the same heat treatment duration time 2 h, the Q0 value reaches 47584.00 from 23833.93.

关 键 词：微波陶瓷 钛酸锌 热处理 介电性能 

分 类 号：TQ174[化学工程—陶瓷工业]