| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1260267 | Journal of Rare Earths | 2007 | 5 Pages |
Abstract
SrBi4Ti4O15(SBTi) ferroelectric ceramics with excess bismuth (Bi) contents ranging from 0% to 25% were prepared by sol-gel method. Effects of excess Bi contents on the microstructure and electric properties were investigated. The SBTi ceramics sample with 10% of excess Bi showed a pure layered perovskite structure with enhancee electric properties. Its Curie temperature, relative dielectric constant, dielectric loss, remanent polarization (2Pr) and coercive field (2Ec) were 518 °C, 248, 0.0021, 20.5 μC·cm−2and 87.8 kV · cm−1, respectively. The degraded electric properties observed in SBTi ceramics with excess bismuth contents lower or higher than 10% could be attributed to the structure defects and the formation of a second phase.
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