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- Title
Nonlinear electrical characteristics and dielectric properties of (Ca, Ta)-doped TiO<sub>2</sub> ceramics.
- Authors
Wang, W. Y.; Zhang, D. F.; Chen, X. L.
- Abstract
TiO2 ceramics doped with 1.0 mol% Ca and different concentrations of Ta were obtained by sintering processing at 1450°C. The microstructures, nonlinear electrical behavior and dielectric properties of the ceramics were investigated. The samples have nonlinear coefficients of α = 2.0–5.0 and ultrahigh relative dielectric constants which is up to 105. Especially, the effects of Ta dopant on the nonlinear electrical characteristics and dielectric properties of the (Ca, Ta)-doped TiO2 ceramics were studied in detail. When the concentration of Ta is 2.0 mol%, the sample exhibits the highest nonlinear coefficient and a comparatively lower dielectric constant. By analogy to a grain-boundary atomic defect model, the effects of Ta and the nonlinear electrical behavior of the TiO2 system were explained.
- Subjects
TANTALUM; CALCIUM; CERAMICS; NONLINEAR electric circuits; DIELECTRICS; MATERIALS science
- Publication
Journal of Materials Science, 2003, Vol 38, Issue 9, p2049
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1023/A:1023506009180