Dielectric Properties of 0.9Ag0.9Li0.1NbO3 - 0.1Bi0.5K0.5TiO3 Ceramics

被引：0
作者：
Pozingis, J. [1 ]
Macutkevic, J. [1 ]
Grigalaitis, R. [1 ]
Banys, J. [1 ]
Lupascu, D. C. [2 ]
机构：
[1] Vilnius State Univ, Dept Radiophys, Vilnius, Lithuania
[2] Univ Duisburg Essen, Inst Mat Sci, Essen, Germany
来源：
FERROELECTRICS | 2014年 / 463卷 / 01期
关键词：
Ceramics; dielectric spectroscopy; ferrielectrics;
D O I：
10.1080/00150193.2014.892358
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
New ferrielectric 0.9Ag(0.9)Li(0.1)NbO(3)-0.1Bi(0.5)K(0.5)TiO(3) ceramics have been obtained. At room temperature ceramics exhibit perovskite structure, which is close to rombohedral-tetragonal phase boundary. The dielectric properties of ceramics were investigated in wide frequency range from 20Hz to 1GHz at temperatures 200K-750 K. 0.9Ag(0.9)Li(0.1)NbO(3)-0.1Bi(0.5)K(0.5)TiO(3) ceramics exhibits a first order mixed order-disorder and displacive ferroelectric phase transition at T-C = 430K. The phase transition dynamics is caused by relaxation soft mode at frequencies below 1GHz and soft phonon mode at higher frequencies. In ferroelectric phase an additional dielectric dispersion is observed, which could be attributed to dipolar glass relaxation.
引用
收藏
页码：99 / 104
页数：6
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