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Details for article 7 of 37 found articles
| Title: |
Dielectric properties of (Ba0.95Ca0.05)(Ti1-yCay)O3-y ceramics |
| Author: |
Zhuang, Zhiqiang Newnham, R. E. |
| Appeared in: |
Ferroelectrics letters section |
| Paging: | Volume 6 (1987) nr. 6 pages 155-164 |
| Year: |
1987-01-01 |
| Contents: |
Calcium doped barium titanate ceramics with composition (Ba0.95Ca0. 05) (Ti1-yCay)O3-y prepared by a liquid mixing technique were used to measure the dielectric properties. The pure barium titanate and lightly-Ca-doped materials obey a Curie Weiss law when the temperature is above the Curie temperature. It has been found that the average cubic-tetragonal phase transition temperature moves downward when the octahedrally-coordinated Ca concentration increases, and heavily-Ca-doped barium titanate ceramics show relaxor behavior with a diffuse phase transition characteristic (DPT). Above the average transition temperature Tav the dielectric properties for heavily doped materials do not obey the Curie Weiss law, but can be described by a quadratic relation over a wide range of temperature. Experiments have shown that there exists an extra K(T) peak attributable to the existence of separate microregions of Ba0.95Ca0.05TiO3 in a matrix of (Ba0.95Ca0.05) (Ti1-yCay)O3-y (where y ≤ 2%). |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 7 of 37 found articles
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