Quantitative description of the phase transition of Aurivillius oxides Sm modified BaBi4Ti4O15 ceramics

被引：5

作者：

Fang, Pinyang ^{[1
,2
]}

Liu, Peng ^{[1
]}

Xi, Zengzhe ^{[2
]}

机构：

[1] Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian 710062, Peoples R China

[2] Xian Technol Univ, Sch Mat & Chem Engn, Shaanxi Key Lab Photoelect Funct Mat & Devices, Xian 710032, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2015年 / 468卷

基金：

中国国家自然科学基金;

关键词：

Ceramics; Aurivillius oxides; Dielectric relaxation; ELECTRICAL-PROPERTIES; FERROELECTRIC CERAMICS; RELAXOR FERROELECTRICS; DIELECTRIC-PROPERTIES; BISMUTH TITANATE; LA-SUBSTITUTION; BABI4-XLAXTI4O15; CRYSTALS;

D O I：

10.1016/j.physb.2015.03.033

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

BaBi4Ti4O15 + xwt.%Sm2O3 (x = 0.00, 0.25, 0.50, 0.75) ceramics were prepared by the solid-state reaction method. The effect of samarium additives on the structural and electrical properties of BBT ceramic was investigated. XRD patterns indicate that all ceramics are an m=4 members of Aurivillius oxides and no secondary phases were detected. A broad dielectric peak in frequency dependent dielectric spectrum is observed during the phase transition of all the BBT ceramics. The modified Curie-Weiss law, Vogel-Fucher relationship and Lorentz-type law were used to describe the phase transition behavior. The relaxor behavior was described well by the modified Curie-Weiss law and Vogel-Fucher relation. The effect of samarium additives on the degree of relaxation and diffuseness of BBT ceramics was discussed. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：34 / 38

页数：5

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