Relaxations in Ba2BiTaO6 ceramics investigated by impedance and electric modulus spectroscopies

被引：8

作者：

Rodrigues, Joao Elias Figuereido Soares ^{[1
]}

de Araujo Paschoal, Carlos William ^{[1
]}

Silva, Eder Nascimento ^{[1
]}

Mince, Kathryn A. ^{[2
]}

Lufaso, Michael W. ^{[2
]}

机构：

[1] Univ Fed Maranhao, CCET, Dept Fis, BR-65085580 Sao Luis, MA, Brazil

[2] Univ N Florida, Dept Chem, Jacksonville, FL 32224 USA

来源：

MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 03期

关键词：

Ceramics; Impedance spectroscopy; Dielectric properties; Ionic conductivity; MICROWAVE DIELECTRIC-PROPERTIES; BAPBO3-BABIO3; SYSTEM; POWDER DIFFRACTION; SUPERCONDUCTIVITY; BABIO3; PRESSURE; DISPROPORTIONATION; BA2BISBO6; BA5TA4O15; BEHAVIOR;

D O I：

10.1016/j.materresbull.2011.11.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Impedance spectroscopy analysis of the dielectric properties of a Ba2BiTaO6 ceramic was performed in the temperature range from room temperature to 500 K. The sample was prepared using conventional solid state synthesis under air and the X-ray diffraction shows the presence of Ba5Ta4O15 as a minor secondary phase (0.09%). The impedance data clearly show contributions of the grain and grain boundary. The results indicate that the conduction in Ba2BiTaO6 is due to hopping of oxygen vacancies and that the impurities not influence the conduction mechanism. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：878 / 882

页数：5

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