期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 31, 期 7, 页码 1277-1283出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2010.05.024
关键词
Phase equilibria; Ceria; Lanthana; Solid solutions; Lattice parameters
Materials based on CeO2-La2O3 system are promising candidates for a wide range of applications, but the phase relationship has not been studied systematically previously. To address this challenge, the subsection of the phase diagram for 1100 and 1500 degrees C have been elucidated. Samples of different compositions have been prepared from nitrate acid solutions using conventional ceramic techniques; evaporation, drying, and calcinations. The phase relations in the binary CeO2-La2O3 system at 1100-1500 degrees C were studied from the heat treated samples using X-ray diffraction analysis, petrographic investigation and scanning electron microscopy in the overall concentration range. It was established that in the binary CeO2-La2O3 system there exist fields of solid solutions based on hexagonal (A) modification of La2O3, and cubic modification of CeO2 with fluorite-type structure (F). The systematic study that covered whole composition range excluded formation of new phases. The refined lattice parameter of the unit cell and the boundaries of the homogeneity fields for solid solutions were determined. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据