Influence of dc bias field on dielectric properties of high-k Y5V (Ba, La)(Ti, Ce)O3 ceramic

被引：6
|
作者：
Lu, Da-Yong
机构：
[1] Research Center for Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin
来源：
MATERIALS LETTERS | 2009年 / 63卷 / 20期
关键词：
Barium lanthanum titanate cerate; Ceramics; Perovskite relaxor; Bias; Dielectrics; Tunability; BARIUM-TITANATE CERAMICS; BA0.6SR0.4TIO3; FILMS;
D O I：
10.1016/j.matlet.2009.05.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of dc bias field (E-bias) on the dielectric properties of high-k Y5V (Ba0.94La0.03)(Ti0.94Ce0.05)O-3 ceramic (BL3TC5) was investigated. With increasing E-bias from 1 to 12.5 kV/cm, dielectric permittivity and dielectric loss were suppressed, and the permittivity maximum decreased linearly. Upon field heating and field cooling, the temperature of the permittivity maximum shifted to higher temperatures; however, the dielectric heat relaxation decreased with increasing E-bias. As E-bias >= 10 kV/cm, the frequency dispersion vanishes. The model of polar nano-domains is proposed to account for dielectric behavior under dc bias field. In addition, BL3TC5 shows high turability (similar to 67%) and low loss (<0.008) at room temperature. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：1722 / 1724
页数：3
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