SrBi_2Ta_2O_9(SBT)铁电粉体和薄膜的溶胶-凝胶法制备  

PREPARATION OF SrBi_2Ta_2O_9(SBT) FERROELECTRIC POWDERS AND THIN FILMS BY SOL-GEL PROCESS

作　　者：洪序达[1] 王歆[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《陶瓷学报》2011年第1期72-76,共5页Journal of Ceramics

摘　　要：研究了水溶性柠檬酸钽的制备工艺。以硝酸锶、硝酸铋和柠檬酸钽为原料,柠檬酸和EDTA为复合螯合剂,合成稳定的SBT溶胶和凝胶,制备出SBT粉体和薄膜。实验结果表明:柠檬酸和Ta离子摩尔比为8∶1时可得澄清稳定柠檬酸钽溶液;气氛对SBT凝胶的热解有显著影响;凝胶在不同温度煅烧下只出现钙钛矿相;薄膜表面质量良好。The preparation of water-soluble tantalum citrate was studied.Stable SBT sol and gel were synthesized using strontium nitrate,bismuth nitrate and tantalum citrate as raw materials and citric acid and EDTA as complex chelating agent,and then SBT powder and thin films were prepared.The results indicated that when the molar ratio of CA to Ta ions is 8,clear and stable tantalum citrate solution was obtained.Atmosphere had a significant impact on the pyrolysis of SBT gel.In calcinating process at different temperatures,only perovskite appeared.The surface quality of SBT thin films was good.

关 键 词：溶胶-凝胶 柠檬酸钽 SBT 钙钛矿相 

分 类 号：TQ174.75[化学工程—陶瓷工业]