Effect of La-substitution on structural and dielectric properties of Bi(Sc1/2Fe1/2)O3 ceramics

被引：22

作者：

Choudhary, R. N. P. ^{[1
]}

Pradhan, Dillip K. ^{[1
]}

Bonilla, G. E. ^{[1
]}

Katiyar, R. S. ^{[1
]}

机构：

[1] Univ Puerto Rico, Dept Phys, San Juan, PR 00931 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 437卷 / 1-2期

关键词：

ceramics; X-ray diffraction; oxide materials; sintering; dielectrics response;

D O I：

10.1016/j.jallcom.2006.07.077

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The polycrystalline samples of La-modified Bi(Sc1/2Fe1/2)O-3 (i.e., (Bi1-xLax)(Sc1/2Fe1/2)O-3) were prepared using a solid-state reaction technique. The formation of single-phase compound was checked with an X-ray diffraction (XRD) technique. A small amount of La-substitution (0 <= x <= 0.15) at the Bi site does not change the crystal structure of Bi(Sc1/2Fe1/2)O-3. Detailed studies of dielectric properties (i.e., dielectric constant, loss tangent and ac conductivity) showed significant effect of La doping on these properties. High dielectric constant with relatively low loss tangent and electrical conductivity of the mixed-type (i.e., space charge and oxygen ion vacancies) are some of the special features of the La-modified Bi(Sc1/2Fe1/2)O-3 compounds. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：220 / 224

页数：5

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