AC conductivity and dielectric properties of (Bi,Na)TiO3-BaTiO3 lead free ceramics

被引：32
作者：
Kang, Woo-Seok [1 ]
Lee, Sang-Kwon [2 ]
Koh, Jung-Hyuk [1 ]
机构：
[1] Chung Ang Univ, Sch Elect & Elect Engn, Seoul 156756, South Korea
[2] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 05期
基金：
新加坡国家研究基金会;
关键词：
Dielectric properties; Electrical conductivity; Lead free; Piezoelectric; X-ray diffraction; ELECTRICAL-PROPERTIES; BEHAVIOR;
D O I：
10.1016/j.ceramint.2015.01.147
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
(Bi,Na)TiO3 (BNT) based ceramics have been extensively investigated for electronic device applications. BNT is ferroelectric material with ABO(3) perovskite structure. BNT ceramics have high Curie temperature (T-c = 320 degrees C) and remanent polarization (P-r=38 mu C/cm(2)). Despite its relatively high coercive field (E-c=7.3 kV/mm) and low piezoelectric constant (d(33)=83 pC/N). Temperature and frequency dependent relative dielectric permittivity and loss tangent can play an important role in the device performance. To analyze the dielectric characteristics across wide temperature (303-403 K) and frequency range (1 kHz to 3 MHz), AC conductivities of (1-x)(Bi0.5Na0.5TiO3)-x(BaTiO3) (x=0, 0.02, 0.04, 0.06, 0.08, or 0.10) were measured and analyzed. The conduction mechanism was evaluated through simulations and calculations based on an Arrhenius-type equation. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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收藏
页码：6925 / 6932
页数：8
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