Paper Title:
The Role of Niobium in (Ca, Si, Ce, Nb)-Doped TiO2 Varistors
  Abstract

The present work attempted to investigate the effect of Nb addition on the electrical properties of the (Ca,Si,Ce,Nb)-doped TiO2 ceramics. The content of added niobium is in the range 0.1-1.0mol %, while that of the other additives keeps constant. The results showed that an optimal composition doped with 0.8mol% Nb2O5, followed by sintering at 1350°C, was obtained with low V1 mA of 7.22V, high nonlinear coefficient of 5.76, ultrahigh dielectric constant (er = 86000) as well as relatively low loss (tgd = 0.52) in room temperature at 1 kHz. SEM studies show that change of niobium had significant influence on grain growth and micro structural characteristics of the sintered samples.

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
297-300
DOI
10.4028/www.scientific.net/KEM.280-283.297
Citation
S. H. Luo, Z. L. Tang, H. Y. Li, Z. T. Zhang, X. Z. Xiong, "The Role of Niobium in (Ca, Si, Ce, Nb)-Doped TiO2 Varistors", Key Engineering Materials, Vols. 280-283, pp. 297-300, 2005
Online since
February 2007
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Price
$32.00
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