Paper Title:
Influence of Excess Bi2O3 on the Characteristics of (Na0.5Bi0.5)TiO3-BaTiO3 Ceramics
  Abstract

In this study, piezoelectric materials 0.95 (Na0.5Bi0.5)TiO3-0.05 BaTiO3 (NBT-BT) composition with excess x wt% Bi2O3 (x=0, 1, 2, and 3) are investigated as a function of sintering temperatures. The sintering characteristics and dielectric characteristics of excess Bi2O3-doped 0.95 (Na0.5Bi0.5)TiO3- 0.05 BaTiO3 ceramics are developed with the aid of SEM, XRD patterns, and dielectric-temperature curves. The sintering process is carried out in air for 2h from 1120oC to 1200oC. Dielectric-temperature properties are investigated in the temperature range of 30oC~350oC at the frequencies of 10KHz~1MHz. The maximum dielectric constants of NBT-BT ceramics first increase with the increase of Bi2O3 content, reach the maximum at 1wt%- Bi2O3-added NBT-BT ceramics, and then decrease with the further increase of Bi2O3 content. The maximum dielectric constants of NBT-BT ceramics are almost unchanged as the measured frequency increases. The Curie temperatures of NBT-BT ceramics are also developed.

  Info
Periodical
Key Engineering Materials (Volumes 368-372)
Edited by
Wei Pan and Jianghong Gong
Pages
65-68
DOI
10.4028/www.scientific.net/KEM.368-372.65
Citation
Y. F. Wei, C. H. Kao, C. F. Yang, H. H. Chung, H. H. Huang, Y. S. Yang, "Influence of Excess Bi2O3 on the Characteristics of (Na0.5Bi0.5)TiO3-BaTiO3 Ceramics", Key Engineering Materials, Vols. 368-372, pp. 65-68, 2008
Online since
February 2008
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