Effect of solvents on the morphology and structure of barium titanate synthesized by a one-step hydrothermal method

作     者：Xiaoxiao Pang Tingting Wang Bin Liu Xiayue Fan Xiaorui Liu Jing Shen Cheng Zhong Wenbin Hu Xiaoxiao Pang;Tingting Wang;Bin Liu;Xiayue Fan;Xiaorui Liu;Jing Shen;Cheng Zhong;Wenbin Hu

作者机构：Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)and Tianjin Key Laboratory of Composite and Functional MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China Chongqing Newcent New Materials Co.Ltd.Chongqing 401147China Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityFuzhou 350207China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2023年第30卷第7期

页      面：1407-1416页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by Chongqing Newcent New Materials Co. Ltd. China (No.2021GKF-0708). 

主　　题：barium titanate hydrothermal synthesis tetragonality solvent effects 

摘      要：Tetragonal barium titanate was synthesized from barium hydroxide octahydrate and titanium tetrachloride through a simple one-step hydrothermal method.The effect of different solvents on the crystal structure and morphology of barium titanate nanoparticles during the hy-drothermal process was investigated.Except for ethylene glycol/water solvent,impurity-free barium titanate was synthesized in pure water,methanol/water,ethanol/water,and isopropyl alcohol/water mixed solvents.Compared with other alcohols,ethanol promotes the formation of a tetragonal structure.In addition,characterization studies confirm that particles synthesized in methanol/water,ethanol/water,and isopropyl al-cohol/water mixed solvents are smaller in size than those synthesized in pure water.In the case of alcohol-containing solvents,the particle size decreases in the order of isopropanol,ethanol,and methanol.Among all the media used in this study,ethanol/water is considered the optimum reaction media for barium titanate with high tetragonality(defined as the ratio of two lattice parameters c and a,c/a=1.0088)and small aver-age particle size(82 nm),which indicates its great application potential in multilayer ceramic capacitors.