掺镧钛酸铋薄膜制备过程的光谱研究  

Spectrum Study on the Formation of La Modified Bismuth Titanate Film

作　　者：毕磊[1] 刘伟良[2] 王秀峰[3] 许静[3] 魏玉玲[3] 

机构地区：[1]青岛科技大学高分子科学与工程学院,青岛266042 [2]山东大学物理与微电子学院,济南250100 [3]山东轻工业学院分析测试中心,济南250100

出　　处：《山东陶瓷》2006年第3期3-6,共4页Shandong Ceramics

基　　金：国家自然科学基金资助项目(10274043)

摘　　要：采用金属有机物分解法(MOD)制备了掺La钛酸铋铁电薄膜并对其膜的形成过程进行了红外、拉曼光谱研究,为高性能铁电薄膜的制备做出前期准备。研究表明,膜的形成经历了有机物分解和晶相转变过程,相变从600℃开始至700℃基本结束。结晶过程中掺入的La3+取代了晶格中Bi3+的位置,降低了钛酸铋的晶相转变温度,导致了晶格中TiO6构成的正八面体畸变,从而影响了晶体的结构及性能。La modified bismuth titanate films were fabricated by metal organic decomposition method and the formation of the films was studied by infrared and Raman spectroscopy so that the high quality films can be fabricated. The study showed that the formation of the films undergoes a process of decomposition of the organic substances and phase transformation, the phase transformation starts at 600℃ and completes at 700℃. The modification of La^2- substitutes the sites of Bi^3＋ in the lattice structure and decreases the phase transformation temperature of bismuth titanate, it also induces the distortion of TiO6 and influences the structure and performance of material accordingly.

关 键 词：铁电 MOD法 IR RAMAN 钛酸铋 掺杂 

分 类 号：TB383.2[一般工业技术—材料科学与工程]