单相BaCeO_3陶瓷的制备研究  

Study on preparation of single-phase BaCeO_3 ceramics

作　　者：韩丹丹[1,2] 路大勇[1,2] 

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》2012年第5期87-91,共5页Journal of Jilin Institute of Chemical Technology

基　　金：吉林省科技发展计划项目(20100532);吉林省教育厅"双百优秀人才"项目

摘　　要：采用冷压陶瓷技术在不同烧结温度下制备BaCeO3陶瓷.利用X射线衍射(XRD)和拉曼光谱(RS)研究烧结温度对CeO2在BaCeO3陶瓷形成中的固溶性及单相陶瓷形成的影响.研究表明:在1100～1450℃范围内,XRD和RS观测都证实了少量CeO2的残存.当烧结温度增加到1480℃并保持长时间烧结时,CeO2能够完全固溶,以CeO2位于33.07°的(200)XRD峰和460 cm-1处拉曼带的消失为标志,形成具有Pnma正交钙钛矿结构的单相BaCeO3陶瓷.Ba蒸发效应被讨论,Ba位不足由极少量的Ce3B a+-Ce3T i+形成来自补偿.BaCeO3 ceramics were prepared under different sintering temperatures by cold-pressing ceramic technique. The influence of sintering temperature on the solid solution of CeO2 in BaCeO3 and the formation of single-phase ceramics were studied by X-ray diffraction （XRD） and Raman spectroscopy （RS）. The results show that a small amount of CeO2 exists in BaCeO3 ceramics in the sintering temperature range from 1 100 to 1 450 ℃. When the sintering temperature is increased to 1 480 ℃ and held for a longtime sintering, CeO2 is solved completely in the BaCeO3 lattice with the symbol of disappearance of （200） XRD peak at 33.07 ° and the Raman band at 460 cm-1, forming a single-phased BaCeO3 ceramic with Pnma orthorhombic perovskite structure. Ba evaporation effect is discussed and the insufficiency in Ba site is self-compensated by the formation of a small amount of Ca3＋ -Ce Ti 3＋.

关 键 词：铈酸钡陶瓷 固溶性 X射线衍射 拉曼光谱 

分 类 号：O614.23[理学—无机化学]