钛酸铋钾陶瓷的sol-gel法制备及性能表征  

Properties of bismuth potassium titanate ceramic prepared by sol-gel method

作　　者：何敏[1] 赵苏串[1] 

机构地区：[1]上海大学物理系,上海200444

出　　处：《电子元件与材料》2010年第6期60-63,共4页Electronic Components And Materials

基　　金：上海大学创新基金资助项目(No.A.10-0101-07-432)

摘　　要：以硝酸钾,五水硝酸铋,钛酸四丁酯为原料,采用sol-gel法制备了K0.5Bi0.5TiO3(KBT)压电陶瓷,分别用DSC-TGA、XRD和FT-IR分析了凝胶的热演化、晶化与相变过程,研究了KBT陶瓷的介电性能。结果表明:600℃烧结即可合成纯钙钛矿相KBT粉体;sol-gel法比传统固相反应法的烧结温度降低约200℃,且能有效控制晶粒长大,抑制杂相生成。所制KBT陶瓷的介电温谱的分析结果显示KBT为典型的弛豫型铁电体。K0.5Bi0.5TiO3 (abbreviated as KBT) piezoelectric ceramics were prepared by the sol-gel method with raw materials of bismuth nitrate, potassium nitrate, and tetrabutyl titanate. DSC-TGA, XRD and FT-IR were employed to analyze the thermal evolution, crystallization and phase transformations of the gelling. The dielectric properties of the KBT ceramics were studied. The results show the sol-gel method can produce pure perovskite phase KBT powders at 600 ℃, which is 200 ℃ lower than that of the conventional sol...

关 键 词：SOL-GEL法 K0.5Bi0.5TiO3 介温特性 纯钙钛矿相 

分 类 号：TM282[一般工业技术—材料科学与工程]