Zr取代对(PbCa)(MgNb)O_3微波介电性能的影响  

Influence of Zr substitution on the microwave dielectric properties of (PbCa)(MgNb)O_3

作　　者：周东祥[1] 蔡雪卿[1] 胡明哲[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2004年第9期25-27,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划基金资助项目 (2 0 0 1AA ZB32 0 1 ) ;教育部科学技术研究重大基金资助项目 (重大 0 2 0 6 )

摘　　要：研究了B位Zr4+ 取代对 (Pb0 .4Ca0 .6) (Mg1 /3 Nb2 /3 )O3 体系结构及介电性能的影响 .研究表明在B位进行Zr取代后 ,对体系的烧结性能、微波介电性能都有比较明显的影响 .随着Zr取代量的增加 ,体系的体密度 ,相对介电常数都有了大幅度的提高 ;Qf0 值和τf 值也都随着取代量的增加而上升 ,最后达到饱和 .当烧结温度为 1 2 6 0℃ (2 .5h)时 ,组成为 (Pb0 .4Ca0 .6) { (Mg1 /3 Nb2 /3 ) 0 .97Zr0 .0 3 }O3 的陶瓷样品微波性能为 :εr=6 3.2 ,Qf0 =6 972GHz ,τf=1 9.8× 1 0 -6/℃ .The influence of Zr 4+ substitution at B site of perovskite structure in (Pb 0.4 Ca 0.6 ) (Mg 1/3 Nb 2/3 )O 3 system on the microwave properties and crystal structures was studied. The results showed that Zr substitution at B site had effect on the sintering of the system and its microwave dielectric properties. With the increase of Zr content, bulk densities of the system and its dielectric constants increased. The Qf 0 value and the τ f value increased to be saturated. The microwave properties of (Pb 0.4 Ca 0.6 ) {(Mg 1/3 Nb 2/3 ) 0.97 Zr 0.03 }O 3 ceramic sintered at 1?260?℃(2.5?h), ε r=63.2, Qf 0 =6?972?GHz, τ f =19.8×10 -6 /℃.

关 键 词：微波介质陶瓷 钙钛矿结构 介电常数 品质因数 谐振频率温度系数 

分 类 号：TM534[电气工程—电器]