Structural and dielectric properties of (Na0.5Bi0.5)0.70Ba0.30TiO3 ceramics
Structural and dielectric properties of (Na0.5Bi0.5)0.70Ba0.30TiO3 ceramics
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DOI：
10.1016/s0955-2219(02)00406-5
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发表时间：
2003-09
影响因子：
5.7
通讯作者：
J. Suchanicz;J. Kusz;H. Böhm;H. Duda;J. Mercurio;K. Konieczny
中科院分区：
文献类型：
--
作者：
J. Suchanicz;J. Kusz;H. Böhm;H. Duda;J. Mercurio;K. Konieczny
用X射线衍射和室温至450 °C的介电、铁电性能测试研究了（Na_（0.5）Bi_（0.5））Ba_（0.30）TiO_3陶瓷。在200 °C附近观察到介电常数和介电损耗的急剧增加。介电响应的急剧增加表明正常和弛豫铁电状态之间的转换。发现极区可以在更高的温度下存在。X射线衍射研究表明，该转变对应于从四方相到立方相的一级相变。还指出了（Na0.5Bi0.5）0.70Ba0.30TiO3陶瓷在器械应用中的用途。
A (Na0.5Bi0.5)0.70Ba0.30TiO3ceramic has been studied by X-ray diffraction and by measurements of dielectric and ferroelectric properties between room temperature and 450 °C. A sharp increase in the electric permittivity and dielectric loss near 200 °C has been observed. This sharp increase in dielectric responses indicates a transformation between normal and relaxor ferroelectric states. It is found that polar regions can exist at higher temperatures. The X-ray diffraction study shows that the transformation corresponds to the first order phase transition from tetragonal to cubic. The use of the (Na0.5Bi0.5)0.70Ba0.30TiO3ceramic for device application has also been indicated.