拉曼光谱在Ba(Ti_(1-x)Fe_x)O_(3-δ)陶瓷中的“电荷效应”湮灭  

Annihilation of "Charge Effect" of Raman Spectra in Ba(Ti_(1-x)Fe_x)O_(3-δ) Ceramics

作　　者：韩丹丹[1,2] 路大勇[1] 

机构地区：[1]吉林化工学院材料科学与工程研究中心,吉林吉林132022 [2]东北师范大学化学学院,吉林长春130024

出　　处：《吉林化工学院学报》2013年第3期68-70,共3页Journal of Jilin Institute of Chemical Technology

基　　金：吉林省科技发展计划项目(20121825);吉林市科技发展计划项目(201212206)

摘　　要：采用冷压陶瓷技术制备具有六方钙钛矿结构的Ba(Ti1-xFex)O3-δ(x=0.05,0.08)陶瓷.由拉曼光谱(RS)技术研究Ba(Ti1-xFex)O3-δ陶瓷在840 cm-1处的"电荷效应".实验观察到代表电荷效应的840 cm-1带消失,其原因最可能是:Fe3+相对于Ti4+具有更小的离子半径、Fe3+-Vo-Fe3+缺陷复合体的形成以及具有低对称性晶格点阵的六方畸变导致电荷效应湮灭.Ba（ Ti1-xFex ）03_a （x = O. 05 and 0.08 ） ceramics with a hexagonal perovskite structure were prepared by a cold-pressing ceramic technique. The ＂ charge effect＂ of Raman spectra at 840 cm-1 in Ba1 -x Fex ）03 _a ceramics was studied using Raman spectroscopy（RS）. It was observed from our experiments that the 840 cm-i band disappeared in BaI _xFe~ ）03 _a ceramics. The reasonable explanations for this phenomenon are that the smaller ionic size of Fe3 ~ with respect to Ti4 ~ ,the formation of Fe3 ~ - Vo - Fe3 ~ defect complexes, and the hexagonal deformation with lower lattice symmetry, are responsible for the annihilation of ＂charge effect＂ in Ba, _~Fe~ ） O~ -s ceramics.

关 键 词：钛铁酸钡陶瓷 六方相 X射线衍射 拉曼光谱 

分 类 号：O614.23[理学—无机化学]