| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7967100 | Journal of Nuclear Materials | 2015 | 6 Pages |
Abstract
Zirconolite glass-ceramic wasteforms were prepared using a suite of Na2O-Al2O3-B2O3-SiO2 glass matrices with variable Al:B ratios. Zirconolite was the dominant crystalline phase only for the most alumina rich glass compositions. As the Al:B ratio decreased zirconolite was replaced by sphene, zircon and rutile. Thermodynamic data were used to calculate a silica activity in the glass melt below which zirconolite is the favoured crystalline phase. The concept of the crystalline reference state of glass melts is then utilised to provide a physical basis for why silica activity varies with the Al:B ratio.
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Physical Sciences and Engineering
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Nuclear Energy and Engineering
Authors
Ewan Maddrell, Stephanie Thornber, Neil C. Hyatt,