Phase relations and lattice thermal expansion studies in the Ce0.50RE0.50O1.75 (RE= rare-earths)

被引：38
作者：
Chavan, SV [1 ]
Tyagi, AK [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Appl Chem, Bombay 400085, Maharashtra, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 404卷 / 1-2期
关键词：
phase relation; ceria; thermal expansion; rare-earths;
D O I：
10.1016/j.msea.2005.05.036
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The synthesis, characterization and lattice thermal expansion of a series of compounds with the general composition Ce0.50RE0.50O1.75 (RE = trivalent rare-earth ion) are being reported. XRD pattern of each product was refined to know the lattice parameters in each case under the conditions of slow-cooling from 1400 degrees C. It was observed that the compositions with a 50 mol% of REO 1.5 substitution (RE = La to Ho) were all cubic solid solutions (either F-type or C-type). A steady decrease in the cubic lattice parameter value was observed on going from La to Ho, in the Ce0.50RE0.50O1.75 series. The compositions with a 50 mol% of REO 1.5 substitution (RE3+ = Er3+, Yb3+, Lu3+ and SC3+) were found to be biphasic. The lattice thermal expansion behavior, as investigated by a high temperature-XRD, for each composition in the temperature range 293-1473 K is also being reported. (c) 2005 Elsevier B.V. All rights reserved.
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页码：57 / 63
页数：7
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