Role of grain boundaries on the electrical properties of ZnO-Ag nanocomposites: An impedance spectroscopic study

被引：45

作者：

Jose, J ^{[1
]}

Khadar, MA ^{[1
]}

机构：

[1] Univ Kerala, Dept Phys, Thiruvananthapuram 695581, Kerala, India

来源：

ACTA MATERIALIA | 2001年 / 49卷 / 04期

关键词：

nanocomposites; electrical properties; grain boundaries;

D O I：

10.1016/S1359-6454(00)00369-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanoparticles of ZnO were prepared by chemical arrested precipitation and those of silver were prepared by a reduction method. The average particle size was determined from X-ray line broadening. The ac electrical response of the consolidated ZnO-Ag nanocomposites was studied using impedance spectroscopy. The equivalent circuit parameters were determined by computer simulation of experimental data. The grain and grain boundary contributions to the conductivity were determined. The variation in the conductivity of nanocomposites in comparison with that of nanophase ZnO was attributed to the formation of Ag2O, the presence of which was confirmed by X-ray diffraction. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：729 / 735

页数：7

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