Preparation of Oriented Barium Titanate Thin Films by Combination of Electrophoretic Deposition with Hydrothermal Treatment  

作　　者：Lihong Xue and Youwei Yan State Key Laboratory of Materials Processing and Die and Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,China 

出　　处：《Journal of Materials Science & Technology》2010年第11期996-1000,共5页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 51002054);the Natural Science Foundation of Hubei Province of China (No.2008CB252);the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry

摘　　要：Highly oriented barium titanate （BaTiO 3） thin films on Pt substrate were fabricated by combination of electrophoretic deposition with hydrothermal treatment.The structure and morphology of thin films were characterized by X-ray diffraction and field-emission scanning electron microscopy.It is found that the titania precursor film,Ba（OH）2 concentration and hydrothermal temperature play crucial roles in the film morphology and orientation.The BaTiO3 thin films with highly （110） preferred orientation can be formed on polycrystalline Pt substrate by appropriate adjustment of the reaction conditions.The orientation parameter f of highly oriented BaTiO3 films was up to 1.00.The films exhibited a smooth and crack-free surface and remained in the layered structure.In situ topotactic transformation and dissolution-crystallization mechanisms were proposed to explain the morphology and orientation of BaTiO3 films during hydrothermal treatment.Highly oriented barium titanate （BaTiO 3） thin films on Pt substrate were fabricated by combination of electrophoretic deposition with hydrothermal treatment.The structure and morphology of thin films were characterized by X-ray diffraction and field-emission scanning electron microscopy.It is found that the titania precursor film,Ba（OH）2 concentration and hydrothermal temperature play crucial roles in the film morphology and orientation.The BaTiO3 thin films with highly （110） preferred orientation can be formed on polycrystalline Pt substrate by appropriate adjustment of the reaction conditions.The orientation parameter f of highly oriented BaTiO3 films was up to 1.00.The films exhibited a smooth and crack-free surface and remained in the layered structure.In situ topotactic transformation and dissolution-crystallization mechanisms were proposed to explain the morphology and orientation of BaTiO3 films during hydrothermal treatment.

关 键 词：Barium titanate Preferred orientation Electrophoretic deposition Hydrothermal treatment 

分 类 号：TB383.2[一般工业技术—材料科学与工程]