硅酸盐学报2008，Vol.36Issue(12)：1705-1709,5.
粉体合成温度对钽酸锶铋陶瓷介电行为的影响
EFFECT OF POWDER SYNTHESIS TEMPERATURES ON DIELECTRIC PROPERTIES OF SrBi2Ta2O9 CERAMIC
李宝让 1刘东雨 1毛雪平1
作者信息
- 1. 华北电力大学,电站设备状态监测与控制教育部重点实验室,北京,102206
- 折叠
摘要
Abstract
Raw materials Ta2O5,SrCO3 and Bi2O3 were used as starting materials to prepare SrBi2Ta2O9 powders via the conventional solid-state reaction method.SrBi2Ta2O9 powders were prepared successfully at different synthesis temperatures of 800,900,1 000℃,and 1 100℃,respectively.Effect of powder synthesis temperatures on the dielectric properties of SrBi2Ta2O9 ceramic was investigated.X-ray diffraction results show that single pure phase of SrBi2Ta2O9 call be formed at different temperatures.However,densities of sintered bodies at different temperatures were also found to be different.The pores were relatively smaller and had an even distribution at low synthesis temperature.Further investigation of the dielectric properties implied that the powder synthesis temperature had an obvious influence on the Curie temperature and the dielectric properties.The powders synthesis temperature should be kept as low as possible in order to improve the dielectric properties.Higher synthesis temperature usually causes the formation of large pores,which can result in both shifting of the Curie point and deterioration of the dielectric properties.All these changes call be attributed to pores and defects formed during the sintering process.关键词
固相合成/钽酸锶铋/粉体合成温度/介电性能/Curie点Key words
solid-state synthesis/strontium-bismuth-tantalum/powder synthesis temperature/dielectric property/the Curie point分类
化学化工引用本文复制引用
李宝让,刘东雨,毛雪平..粉体合成温度对钽酸锶铋陶瓷介电行为的影响[J].硅酸盐学报,2008,36(12):1705-1709,5.
