熔盐法制备尺寸和形貌可控的钛酸锶  

Synthesis of Controllable Size and Morphology SrTiO_(3) by Molten Salt

作　　者：魏雅妮 吕明[1] 丁明建 李儒强 彭诚 章忠健 WEI Yani;LYU Ming;DING Minjian;LI Ruqiang;PENG Cheng;ZHANG Zhongjian(Schools of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China;Aurora Technologies Co.Ltd,Guangzhou 510288,China)

机构地区：[1]华南理工大学材料科学与工程学院,广州510640 [2]广州天极电子科技有限公司,广州510640

出　　处：《中国陶瓷》2021年第5期22-29,共8页China Ceramics

基　　金：国家自然科学基金(51502097);广州市科技计划项目(201704030095);广州市珠江科技新星(201610010049)。

摘　　要：采用熔盐法制备尺寸和形貌可控的钛酸锶。借助ICP-AES、TG-DTA、XRD、FESEM研究该反应的热动力学过程,探讨熔盐种类对产物的显微结构和表面形貌的影响。结果表明:钛酸锶通过碳酸锶和二氧化钛的固相反应得到;随着熔盐中KCl含量增加,晶胞参数增大,晶粒尺寸也增大;合成的钛酸锶形貌受熔盐种类影响,钠盐环境下通常形成立方或近似立方的钛酸锶,而钾盐有助于形成圆润的多面体。Size and shape controlled SrTiO_(3) particles with using molten salt synthesis(MSS)method were reported in this paper.The as-prepared samples were characterized by an inductively coupled plasma atomic emission spectrometer(ICP-AES),thermogravimetric-differential thermal analysis(TG-DTA),X-ray diffraction(XRD),field-emission scanning electron microscopy(FESEM).The results show that the formation of SrTiO_(3) occurred through solid state reaction between SrCO_(3) and TiO_(2).With increasing the content of potassium chloride in molten salt,the unit cell parameters and the average grain size increases.In addition,morphology of SrTiO_(3) obtained by MSS strongly depend on the types of molten salt used.Cubic and pseudo-cubic SrTiO_(3) microcrystals could be found in NaCl-treated samples,while polyhedron with unclear edges could be found in KCl-treated samples.

关 键 词：熔盐法 钛酸锶 反应机理 形貌 

分 类 号：TQ174.758[化学工程—陶瓷工业]