硅酸盐学报

拓扑化学法合成片状BaTiO3晶体

作者：杜松昭1 2 赵巍2 耿浩然1

单位：1. 济南大学材料科学与工程学院济南 250022 2. 天津城市建设学院材料科学与工程系天津 300384

关键词：钛酸钡拓扑化学法片状晶体微观形貌

分类号：TM282

出版年,卷(期):页码：2012,40(7):988-993

DOI：

摘要：

摘要：采用拓扑化学法，以KCl–NaCl、KCl–BaCl₂等为熔盐体系，在900～1100℃制得BaTiO₃片状晶体，分析了反应各参数对晶体微观形貌及性能的影响。热重、扫描电子显微镜、X射线衍射分析表明：在熔盐体系为KCl–BaCl₂，反应物BaBi₄Ti₄O₁₅与BaCO₃的摩尔比为1:3.1，温度为950℃条件下，得到的BaTiO₃晶体分布均匀、各向异性好、具有规则的片状外形，可以作为制备钙钛矿系织构化陶瓷的良好模板晶体

Abstract: The plate-like crystals of BaTiO₃ were synthesized in KCl–NaCl、KCl–BaCl₂ molten salt systems at 900–1100℃ by a topochemical method. The parameter effects (such as molten salt, synthesis temperature and materials ratio) on the synthesis performance were investigated. The products synthesized were characterized by X-ray diffraction, scanning electron microscopy and differential thermal analysis, respectively. The results indicate that the BaTiO₃ platelets with a high aspect ratio are obtained at 950℃ when the molten salt is KCl–BaCl₂ at the BaBi₄Ti₄O₁₅/BaCO₃ ratio of 1.0:3.1. The platelets can be used as templates for the perovskite-structured textured ceramics.

基金项目：

国家自然科学基金(50871047)；山东省自然科学基金(ZR2010- EM071)资助

作者简介：

第一作者：杜松昭(1987—)，男，硕士研究生。通信作者：耿浩然(1954—)，男，博士，教授

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