Ca[(Li_(1/3)Nb_(2/3))_(0.95)Zr_(0.15-x)Ti_x]O_(3+δ)陶瓷的微波介电性能  

Microwave dielectric properties of Ca[(Li_(1/3)Nb_(2/3))_(0.95) Zr_(0.15-x)Ti_x]O_(3+δ) ceramics

作　　者：熊钢[1,2] 周东祥[2] 龚树萍[2] 

机构地区：[1]咸宁学院信息工程学院,湖北咸宁437000 [2]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《电子元件与材料》2009年第2期5-7,共3页Electronic Components And Materials

基　　金：湖北省科技攻关计划资助项目(No.2004AA102A01)

摘　　要：研究了Zr和Ti复合取代Ca[(Li1/3Nb2/3)0.95Zr0.15-xTix]O3+δ(0≤x≤0.15,CLNZT)陶瓷B位对其晶体结构及微波介电性能的影响,并分析了谐振频率温度系数τf随容忍因子t的变化关系。当0≤x≤0.15时,CLNZT陶瓷为单一斜方钙钛矿相,随x的增加,τf由–9.4×10–6/℃变为–15.8×10–6/℃,而品质因数与谐振频率乘积Q·f值先增大,x=0.10时又开始下降。当x=0.10时,陶瓷具有较好的微波介电性能:εr为32.8,Q·f值为1.66×104GHz,τf为–13.6×10–6/℃。The effects of Zr and Ti co-substitution in B site on the crystal structures and microwave dielectric properties of Ca[（Li1/3Nb2/3）0.95Zr0.15-xTix]O3＋δ （0≤x≤0.15, CLNZT） ceramics were investigated, and the changing relation between temperature coefficient of resonance frequency （τf） and tolerance factor （t） was discussed. CLNZT ceramics possess a single orthorhombic perovskite phase at x = 0-0.15. With an increase of x, the value of τf varies from -9.4×10^-6 /℃ to -15.8×10^-6/℃, However, the product of quality factor and resonance frequency （Q·f） values increases firstly, and then begins to decrease at x = 0.10. When x = 0.10, CLNZT ceramics have better microwave dielectric properties： ετ= 32.8, Q·f= 1.66×10^4 GHz and τf = - 13.6×10^-6/℃.

关 键 词：无机非金属材料 微波介质陶瓷 复合取代 介电性能 容忍因子 

分 类 号：TB303[一般工业技术—材料科学与工程]