Temperature-Stable High Dielectric Constant and Dielectric Relaxation in (1-x)Sr0.5Ba0.5Nb2O6/xNi0.8Cu0.2Fe2O4 Composite Ceramics

被引：1
|
作者：
Lin, Y. Q. [1 ]
Chen, X. M. [1 ]
机构：
[1] Zhejiang Univ, Dept Mat Sci & Engn, Lab Dielect Mat, Hangzhou 310027, Peoples R China
来源：
FERROELECTRICS | 2009年 / 388卷
关键词：
Composite ceramics; dielectric properties; Maxwell-Wagner polarization; CACU3TI4O12; CERAMICS;
D O I：
10.1080/00150190902966875
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Temperature-stable high dielectric constant was observed in magnetoelectric (1-x) Sr0.5Ba0.5Nb2O6/xNi(0.8)Cu(0.2)Fe(2)O(4) composite ceramics. The related dielectric relaxation and the formation of the dielectric platform were discussed in detail with various compositions. The high dielectric constant observed at low frequencies for composite ceramics was interpreted within the Maxwell-Wagner polarization model. Similar to that in CaCu3Ti4O12 a dielectric constant step in a broad temperature interval (323-623 K) was also observed in 0.8Sr(0.5)Ba(0.5)Nb(2)O(6)/0.2Ni(0.8)Cu(0.2)Fe(2)O(4), and it was originated from the compromise between the dielectric relaxations caused by ferroelectric phase transition and thermally activated Maxwell-Wagner polarization process.
引用
收藏
页码：153 / 160
页数：8
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