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BST-MT复相陶瓷的微观形貌和相组成分析

Mingli LI,Mingxia XU,Hui LIANG,Xiaolei LI,Tingxian XU

Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society（2008）

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Abstract
以硝酸钡、硝酸锶和钛酸丁酯为原料,采用草酸盐共沉淀法制备了钛酸锯钡(Ba0.6Sr0.4TiO3,BST)纳米粉体.用固相混合法制备了BST-钛酸镁(Ba0.6Sr0.4TiO3-MgTiO3,BST-MT)复相陶瓷.用扫描电镜观察BST纳米粉体和BST-MT复相陶瓷的形貌.通过X射线衍射分析BST纳米粉体和BST-MT复相陶瓷的相组成.结果表明:草酸盐共沉淀法合成了立方晶相的BST粉体,该纳米粉体具有较好的分散性且形貌规整.用BST粉体与MgTiO3复合所制备的BST-MT复相陶瓷由等轴状和长柱状2种晶粒组成.能谱分析结果表明:等轴状晶粒为BST,长柱状晶粒为MgTiO3;该BST-MT复相陶瓷具有良好的介电常数-温度特性.
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Key words
Composite ceramics,Dielectric property,Microstructure,Strontium barium titanate
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