Dielectric behaviors and relaxor characteristics in Bi0.5Na0.5TiO3-BaTiO3 ceramics

被引：7

作者：

Chen, Pei ^{[1
,2
]}

Wang, Jun ^{[1
,2
]}

Zeng, Weidong ^{[2
]}

Zhou, Changrong ^{[1
,2
]}

Zhang, Yongsheng ^{[2
]}

Li, Qingning ^{[2
]}

Xu, Jiwen ^{[1
,2
]}

Chen, Guohua ^{[1
,2
]}

Yuan, Changlai ^{[1
,2
]}

机构：

[1] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Guangxi, Peoples R China

[2] Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Guangxi, Peoples R China

来源：

JOURNAL OF ADVANCED DIELECTRICS | 2019年 / 9卷 / 05期

关键词：

Bismuth sodium titanate; dielectric relaxor; Vogel-Fulcher law; dielectric tunability; STRUCTURAL EVOLUTION; PHASE-TRANSITIONS; GLASSY BEHAVIOR; LEAD; ELECTROSTRAIN; TUNABILITY;

D O I：

10.1142/S2010135X19500383

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Microstructure and dielectric behaviors of heating/cooling and bias-field were investigated in lead-free ceramics (1 - x)Bi0.5Na0.5TiO3-xBaTiO3 (BNT-xBT, x = 0, 0.02, 0.04, 0.06, 0.08 and 0.10). The relaxor characters and the Vogel-Fulcher law of frequency-dependent dielectric properties were analyzed. Three dielectric anomalies with pronounced frequency dispersion at T-d, a maximum dielectric with variable frequency-dispersion at T-m and a third Maxwell-Wagner-type relaxation over a wide temperature range in high-temperature region were observed. The significant dielectric thermal hysteresis, low barrier energy, high freezing temperature in heating process and the maximum dielectric tunability appeared in x = 0.4 ceramic.

引用

页数：8

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