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Development of Sphene-Based Glass Ceramics Tailored for Canadian Waste Disposal Conditions

Published online by Cambridge University Press:  15 February 2011

Peter J. Hayward  and
E.V. Cecchetto
Peter J. Hayward
Affiliation:
Atomic Energy of Canada Limited, Whiteshell Nuclear Research Establishment, Pinawa, Manitoba, Canada, ROE 1LO
E.V. Cecchetto
Affiliation:
Atomic Energy of Canada Limited, Whiteshell Nuclear Research Establishment, Pinawa, Manitoba, Canada, ROE 1LO
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Abstract

Glass ceramics and ceramics based on minerals of proven thermodynamic stability in Canadian Shield groundwaters are being developed to host the wastes arising from future CANDU* fuel recycling. Sphene-based glass ceramics, produced by melti0n g Na2 O-CaO-Al2O3-TiO2-SiO2 compositions at 1400° C, cooling, ang then reheating the phaseseparated glasses to approximately 1000° C, show strong partitioning of waste ions into the sphene (CaTiSiO5 ) lattice. Leaching results suggest that these materials are durable in deionized water. In simulated groundwaters, the sphene phase appears to suffer no net leaching. Leach testing and manufacturing methods are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 6: Symposium D – Scientific Basis for Nuclear Waste Management IV , 1981 , 91
Copyright
Copyright © Materials Research Society 1982

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References

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