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Solubility of Simulated Hlw Elements in Pyrochlore Structure

Published online by Cambridge University Press:  25 February 2011

Issei Hayakawa  and
Hiroshi Kamizono
Issei Hayakawa
Affiliation:
On leave from NGK Insulators, Ltd
Hiroshi Kamizono
Affiliation:
Dept. of Environmental Safety Research, Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-11, Japan
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Abstract

We have found that lanthanum zirconate (La2Zr2O7) with a pyrochlore structure can be used as a superior host phase for actinide and lantanide elements contained in high-level nuclear waste. The solubility of Ce, Nd and Sr in La2Zr2O7 is determined because Ce and Nd may simulate the segregation of actinide and lanthanide elements at the grain boundaries of polycrystalline La2Zr2O7. The results show that La2Zr2O7 is a promising material for confining actinide and lanthanide elements in its crystal structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 257
Copyright
Copyright © Materials Research Society 1992

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References

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