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The Effect of Glass Composition Containing RE Oxide Waste Glass on Liquidus Temperature

Published online by Cambridge University Press:  20 February 2017

S. Mohd Fadzil  and
P. Hrma
S. Mohd Fadzil*
Affiliation:
Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, 790784 Pohang, South Korea School of Applied Physics, Faculty of Science and Technology, The National University of Malaysia, 43650 Bandar Baru Bangi, Selangor, Malaysia
P. Hrma
Affiliation:
Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, 790784 Pohang, South Korea Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington, The United States
*
*(Email: mfsyazwani86@postech.ac.kr)
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Abstract

The liquidus temperature (TL) of rare earth (RE) was determined for alumino-borosilicate glasses for treating americium and curium that have been studied previously. Their work covers a wide range of glass composition with various crystalline phases as primary phase. Present work is aimed at understanding the effect of glass composition on TL for waste glasses designed for vitrifying RE oxides wastes. In a sufficiently narrow composition region, this effect can be represented by a first-order model fitted measured TL versus composition data. Test glasses were formulated by varying of component fractions one-at-a-time. The glasses contained SiO2, B2O3, and Al2O3 as glass formers and Nd2O3 with CeO2 as simulated RE waste. Twenty glasses were made to investigate crystallization as a function of temperature and glass composition. The primary crystalline phase was Ce-borosilicate (Ce3BSi2O10), secondary phases were Al-containing crystals (Al2O3 and Al10Si2O19), and crystalline CeO2. A first-order model was fitted to crystal fraction versus glass composition data. Generally, SiO2 and B2O3 tend to suppress crystallization, Al2O3 has little effect, and, as expected, RE components (Nd2O3 and CeO2) promote it. The correlation coefficient, R2, was 0.89 for the primary crystalline phase TL as a linear function of composition.

Keywords

waste magagementlanthanideoxide
Type
Articles
Information
MRS Advances , Volume 1 , Issue 63-64: Scientific Basis for Nuclear Waste Management XXXIX , 2016 , pp. 4221 - 4225
Copyright
Copyright © Materials Research Society 2017 

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References

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