Structural and dielectric properties of Ba4R2Ti4Nb6O30 (R = Y, Sm and Dy) ferroelectric ceramics

被引：49

作者：

Palai, R

Choudhary, RNP ^{[1
]}

Tewari, HS

机构：

[1] Indian Inst Technol, Dept Phys, Kharagpur 721302, W Bengal, India

[2] GG Univ, Sch Pure & Appl Phys, Bilaspur, Madhya Pradesh, India

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2001年 / 62卷 / 04期

关键词：

dielectric properties; microstructure; X-ray diffraction;

D O I：

10.1016/S0022-3697(00)00217-1

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polycrystalline samples of Ba4R2Ti4Nb6O30 (R = Y, Sm and Dy), a member of tungsten-bronze (TB) family, were prepared using a high-temperature solid-state reaction technique. A preliminary structural (XRD) analysis of these compounds shows the formation of a single-phase (orthorhombic) compound at room temperature. The scanning electron microscopic (SEM) study with different magnifications provides information on quality of the samples and the uniform grain distribution over the entire surface of the samples. Detailed dielectric studies of the compounds show the existence of ferroelectric-paraelectric phase transition at 33, 48 and 41 degreesC for Y, Sm and Dy containing compounds, respectively. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：695 / 700

页数：6

共 17 条

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