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Liquidus Temperature of Spinel Precipitating High-Level Waste Glasses

Published online by Cambridge University Press:  03 September 2012

M. Mika ,
M. J. Schweiger ,
J. D. Vienna  and
P. Hrma
M. Mika
Affiliation:
Pacific Northwest National Laboratory, Richland, Washington 99352
M. J. Schweiger
Affiliation:
Pacific Northwest National Laboratory, Richland, Washington 99352
J. D. Vienna
Affiliation:
Pacific Northwest National Laboratory, Richland, Washington 99352
P. Hrma
Affiliation:
Pacific Northwest National Laboratory, Richland, Washington 99352
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Abstract

The liquidus temperature (TL) often limits the loading of high-level waste in glass through the constraint that TL must be at least 100°C below the temperature at which the glass viscosity is 5 Pa-s. In this study, values of TL for spinel primary crystalline phase were measured as a function of glass composition. The test glasses were based on high-iron Hanford Site tank wastes. All studied glasses precipitated spinel (Ni,Fe,Mn)(Cr,Fe)2O4 as the primary crystalline phase. TL was increased by additions of Cr2O3, NiO, Al2O3, Fe2O3, MgO, and MnO; while Li2O, Na2O, B2O3, and SiO2 had a negative effect. Empirical mixture models were fitted to data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 71
Copyright
Copyright © Materials Research Society 1997

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References

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