BaTiO_3铁电玻璃陶瓷结构和介电性能的研究

STUDY ON THE STRUCTURE AND DIELECTRIC PROPERTIES OF BaTiO_3 CLASS CERAMICS

采用溶胶－凝胶工艺制备ＢａＴｉＯ３铁电玻璃陶瓷．选择材料的组成成份分别为Ｂａ－Ｔｉ－Ｂ－Ｓｉ－Ｏ和Ｂａ－Ｔｉ－Ａｌ－Ｓｉ－Ｏ．利用 ＸＲＤ分析了上述两个体系的均匀凝胶在热处理后的结晶结构．借助ＳＥＭ观察了微晶形貌．最后测试了这种玻璃陶瓷在不同的温度和频率下的介电常数和损耗，结果表明此类材料具有良好的介电性能．

The preparation and structure of BaTiO3 glass ceramics prepared by Sol-Gel method are presented in this paper. Two systems of Ba-Ti-B-Si-O and Ba-Ti-Al-Si-O were studied. The crystalline structure of the two kinds of homogeneous gels was studied by XRD, and the crystalline morphology was observed by SEM. The dielectric properties of these glass-ceramics at different temperatures and frequencies were tested. The results indicate that these ma-terials have good dielectric properties.