A-site substitution-controlled dielectric dispersion in lead-free sodium bismuth titanate

被引：17
|
作者：
Raghavender, M. [1 ]
Kumar, G. S. [1 ]
Prasad, G. [1 ]
机构：
[1] Osmania Univ, Dept Phys, Mat Res Lab, Hyderabad 500007, Andhra Pradesh, India
来源：
PRAMANA-JOURNAL OF PHYSICS | 2009年 / 72卷 / 06期
关键词：
Na0.5Bi0.5TiO3; lead-free ferroelectrics; dielectric dispersion; impedance; relaxation times; FERROELECTRIC PROPERTIES; PHASE; TRANSITIONS; CERAMICS; VACANCY; SR;
D O I：
10.1007/s12043-009-0092-x
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Effect of doping in Na0.5Bi0.5TiO3 (NBT) with Ce3+ and Sm3+ at the A-site on dielectric behaviour, impedance and conductivity is being reported. Na(0.5)Bi(0.5-x)A(x)TiO(3) samples (A being Ce and Sin) are studied with varying values of X. For Na0.5Bi0.5-xCexTiO3 samples x is 0.001, 0.005 and 0.007 and for Na0.5Bi0.5-xSmxTiO3 samples x is 0.05, 0.1 and 0.15. Dielectric constant and loss are studied in the frequency range 10 kHz to 1 MHz and in the temperature range 30-650 degrees C. Impedance and electric modulus studies are undertaken. The relaxations observed in the samples are non-Debye and activation energies for relaxation and conduction are evaluated.
引用
收藏
页码：999 / 1009
页数：11
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