Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10640229 | Materials Science and Engineering: B | 2005 | 4 Pages |
Abstract
The crystalline structure and dielectric properties of BaxSr1âxTiO3 ceramics with x = 0.45, 0.5, 0.6, 0.65, 0.8, 0.9 were investigated. The a- and c-axis lattice constants of BaxSr1âxTiO3 ceramics were calculated and it is found that the crystal structures are tetragonal phase when x â¥Â 0.65 at room temperature. The Curie-Weiss temperature (T0) is always lower than Curie temperature (TC) and the linear relation between the Curie temperature and the stoichiometric percentage of barium can be observed and expressed as TC (°C) = â195.0 + 322.2x. The values of coercive electric field (EC) and remanent polarization (Pr) increase as Ba/Sr ratio of BaxSr1âxTiO3 ceramics increases except for x â¤Â 0.5, which are due to the decrease in grain size and the difference between the radius of Ba2+ and that of Sr2+.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Chunlin Fu, Chuanren Yang, Hongwei Chen, Yinxin Wang, Liye Hu,