INFLUENCE OF n ON STRUCTURE AND MICROWAVE DIELECTRIC PROPERTIES OF SOME A_(n)B_(n-1)O_(3n)PEROVSKITES  

作　　者：LIANG FANG ZHAO YANG HUI ZHANG CHUNCHUN LI HEPING SU 

机构地区：[1]State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing and Key Laboratory of Nonferrous Materials and New Processing Technology Ministry of Education,Guilin University of Technology Guilin 541004,P.R.China

出　　处：《Journal of Advanced Dielectrics》2011年第1期135-140,共6页先进电介质学报（英文）

基　　金：This work was supported by Natural Science Foundation of China(No.50962004,and No.21061004);Natural Science Foundation of Guangxi(No.0832003Z and No.0832001),and Programs for New Century Excellent Talents in Guangxi(No.2006202).

摘　　要：Two series of B-site deficient perovskites Ba_(5+m)Ti_(m)Nb_(4)O_(15+3m)(m=1,2,3)and Sr_(3+m)LaTi_(m)Nb_(3)O_(12+3m)(m=0,1,2)with the general formula A_(n)B_(n-1)O_(3n)(n=4-8;A=Ba,Sr,La;B=Nb,Ti)have been synthesized,and their structure and microwave dielectric properties have been investigated.The effects of n(number of octahedra layers within a perovskite blocks)on structure and properties are investigated.The values of dielectric constantε_(r)and temperature coe±cient of resonant frequencyτ_(f)gradually increase,but quality factors Q×f values significantly decreases as the values of n increase.

关 键 词：Microwave dielectric properties A_(n)B_(n-1)O_(3n) hexagonal perovskite 

分 类 号：TB3[一般工业技术—材料科学与工程]