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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

预烧对水热BaTiO3介电性能的影响

夏长泰; 施尔畏; 姚尧; 赵梅瑜; 仲维卓; 郭景坤   

  1. 中国科学院上海硅酸盐研究所; 上海200050
  • 收稿日期:1996-09-03 修回日期:1996-10-16 出版日期:1997-10-20 网络出版日期:1997-10-20

Effects of Preheating on the Dielectric Properties of Hydrothermal BaTiO3

XIA Changtai; SHI Erwei; YAO Yao; ZHAO Meiyu; ZHONG Weizhuo; GUO Jingkun   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1996-09-03 Revised:1996-10-16 Published:1997-10-20 Online:1997-10-20

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摘要： 水热BaTiO3粉料可在1240℃进行烧结，但由于粉料含有一定量的表面吸附水和结构水及OH-等缺陷烧结体中气孔较多，介电性能也不理想，粉料在经900℃，2h的预烧处理后，可去除其中的水及OH-等缺陷，示差扫描量热分析表明，粉料中四方相BaTiO3含量从15％增加到28％，并使其烧结体中气孔率降低，介电性能也得到改善.

关键词: 水热BaTiO3, 预烧, 烧结性能, 介电性能

Abstract: Hydrotermal BaTiO3 powders could be sintered at 1240℃, but the sintered exhibited high porosity and unsatisfying dielectric property due to the existance of a certain amount of surface absorbed water, lattice water and OH- etc. defects. Water and OH- etc. defects could be removed by heating the as-prepared powders at 900℃ for 2 hours, diffractional scanning calorimetry analysis indicated that the tetragonality of the powders increased from 15% to 28%, th porosity of the sintered body was lowered,and the dielectric properties were improved.

Key words: hydrothermal BaTiO3, preheating, sintering properties, dielectric properties