Table of Contents
International Journal of Inorganic Chemistry
Volume 2011, Article ID 837091, 4 pages
http://dx.doi.org/10.1155/2011/837091
Research Article

Preparation and Characterization of Ag-Doped BaTiO3 Conductive Powders

Department of Chemistry, Harbin Institute of Technology, Harbin150001, China

Received 5 November 2011; Accepted 15 December 2011

Academic Editor: W. T. Wong

Copyright © 2011 Sue Hao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

BaTiO3 powders doped with Ag at different Ag/Ba molar ratios were prepared by sol-gel method. The resistivity reached the lowest point of 5.644 Ω·m when Ag concentration was 0.10 at% and the powders were calcined for two times at 800°C and 500°C. XRD and FTIR investigations showed that no new substance was formed after the doping and calcining process, but the particle size and the strength of Ti-O bond in modified BaTiO3 crystal cell all changed. The conductivity of Ag-doped BaTiO3 powders with different Ag concentrations and through different preparing methods was discussed by using defect theory.