Solubility of Ce4+ and Sr2+ in the pyrochlore lattice of Gd2Zr2O7 for simulation of Pu and alkaline earth metal

被引：65
|
作者：
Patwe, S. J. [1 ]
Tyagi, A. K. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Div Appl Chem, Bombay 400085, Maharashtra, India
来源：
CERAMICS INTERNATIONAL | 2006年 / 32卷 / 05期
关键词：
zirconate pyrochlore; fluorite; solubility; powder XRD;
D O I：
10.1016/j.ceramint.2005.04.009
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The solubility of Ce4+ and Sr2+ has been studied for the simulation of plutonium, and alkaline-earth metal elements, which are the common fission products in a nuclear fuel, in the zirconate pyrochlore lattice of Gd2Zr2O7 by the A site substitution. A number of compositions with general stoichiometry Gd2-xSrxZr2O7-x/2 and Gd2-xSrx/2Cex/2Zr2O7 have been synthesized and characterized by powder XRD. From the XRD data, the solubility of Sr2+ is estimated to be about 1.25 mol%. Further addition of Sr2+ leads the separation of SrZrO3 perovskite phase. The solubility of Sr2+ increases to 2.5 mol% when substituted in combination with Ce4+. The solubility of Ce4+ is estimated to be about 12.5 mol% in the pyrochlore lattice of Gd2Zr2O7. Further addition of Ce4+ into the pyrochlore lattice leads to the formation of fluorite phase. (c) 2005 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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页码：545 / 548
页数：4
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