Sol-gel方法制备BiFeO_3/Bi_4Ti_3O_(12)多层薄膜及其电性能  

Preparation of BiFeO_3/Bi_4Ti_3O_(12) multilayer with Sol-gel Method and Its Electric Properties

作　　者：王秀章[1] 晏伯武[2] 刘红日[1] 

机构地区：[1]湖北师范学院物理与电子科学学院,黄石435002 [2]黄石理工学院计算机学院,黄石435000

出　　处：《功能材料与器件学报》2010年第1期17-21,共5页Journal of Functional Materials and Devices

基　　金：国家自然科学基金资助项目(10874075);湖北省教育厅重点科技项目基金资助项目(No:D20082203)

摘　　要：采用溶胶-凝胶方法在FTO/glass底电极上制备了BiFeO3/Bi4Ti3O12和Bi4Ti3O12/BiFeO3多层薄膜。研究了室温下薄膜的结构,铁电性质和介电性质,并将其与纯的BiFeO3薄膜的性质进行了比较。从薄膜的XRD模式中可以观察到共存的BiFeO3相和Bi4Ti3O12相。通过电滞回线测量可以看出,相对于纯的BiFeO3薄膜,BiFeO3/Bi4Ti3O12和Bi4Ti3O12/BiFeO3多层薄膜能够承受更高的测试电场而获得充分极化,从而表现出较强的铁电性,在450kV/cm测试电场下,薄膜的剩余极化强度分别为37μC/cm2和23μC/cm2。BiFeO3/ Bi4Ti3 O12 muhilayer film was prepared on FTO/glass bottom electrodes by sol- gel process. Structure, ferroelectric and Dielectric properties at room temperature were studied by comparing with pure BiFeO3 film. BiFeO3 and Bi4Ti3O12 phase can be identified from the XRD pattern. Comparing with pure BiFeO3 film, the BiFeO3/Bi4Ti3O12 and Bi4Ti3O12/BiFeO3 muhilayer film can endure higher applied field and thus getting fully polarization and show more intense ferroelectricity, Under an applied field of 450 kV/cm , the remnant polarizations are 37μC/cm^2 and 23μC/cm^2, respectively.

关 键 词：无机非金属材料 BIFEO3薄膜 BiFeO3/Bi4Ti3O12多层薄膜 铁电性. 

分 类 号：TM22[一般工业技术—材料科学与工程] TM27[电气工程—电工理论与新技术]