Journal article Open Access

Liquidus temperature measurements for modeling oxide glass systems relevant to nuclear waste vitrification

Hanni, Jonathan B.; Pressly, Eric; Crum, Jarrod V.; Minister, Kevin B. C.; Tran, Diana; Hrma, Pavel; Vienna, John D.

Liquidus temperatures (TL) were measured, and primary phases were determined for 50 (from an initial test matrix of 76) compositions within the Al2O3–B2O3–CaO–Na2O–SiO2 glass-forming system and its constituent ternary subsystems. Strong linear correlations have been found between composition and TL for melts within the same primary phase fields. The TL and primary phase data are being used to develop and refine a modified associate species model (ASM). The impacts of Fe2O3, Li2O, NiO, ZrO2, Cr2O3, ZnO, and MnO additions on the TL of two baseline glass compositions are reported. These data are intended as benchmarks for further expansion of the ASM or other silicate melt solution models of nuclear waste glasses.

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