Antiferroelectric phase transition in Pb(Mg1/2X1/2)O3(X = Mo and W)

被引：5

作者：

Palai, R

Choudhary, RNP ^{[1
]}

Tewari, HS

机构：

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

[2] GGD Univ, Sch Pure & Appl Phys, Bilaspur, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2002年 / 73卷 / 01期

关键词：

polycrystalline; solid-state reaction; X-ray diffraction; relative dielectric permittivity; activation energy;

D O I：

10.1016/S0254-0584(01)00369-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline samples of Pb(Mg1/2X1/2)O-3 (X = Mo and W) were synthesized by a high-temperature solid-state react-ion technique. Preliminary structural (X-ray diffraction) study of the compounds shows the formation of a single phase compound, Microstructural study of the compounds shows a uniform distribution of nearly spherical grains throughout the surface of the sample. Detailed studies of relative dielectric permittivity (Er) and loss tangent (tan 3) of the compounds both as a function of frequency ( 10(2)-10(4) Hz) at room temperature (30degreesC) and temperature (30-320 degreesC) at 10kHz suggest that the compounds have anti ferroelectric phase transition. The activation energy of the Mo and W containing compound was found to be 0.61 and 0.72 eV, respectively. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：86 / 92

页数：7

共 19 条

[1] Structural and electrical properties of (Pb1-xCax)(Li1/4La1/4W1/2)O3 [J].