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Control of Nepheline Crystallization in Nuclear Waste Glass
Author(s) -
Fox Kevin M.,
Edwards Thomas B.,
Peeler David K.
Publication year - 2008
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2008.02250.x
Subject(s) - nepheline , frit , materials science , crystallization , boron , nepheline syenite , radioactive waste , chemical engineering , mineralogy , metallurgy , nuclear chemistry , chemistry , organic chemistry , engineering
Glass frits with high B 2 O 3 concentrations, when combined with high‐alumina concentration nuclear waste, will form glasses with durabilities that are acceptable for disposal (normalized boron release of <1.7 g/L) and predictable using a free energy of hydration model. Glasses with nepheline discriminator values closest to 0.62 showed significant differences in durability between the quenched and heat‐treated versions. Nepheline crystallized in the glass with the lowest nepheline discriminator value. The high‐B 2 O 3 frit was successful in producing glasses without crystallization at waste loadings of up to 45 wt%. The melt rate of this frit was also considerably improved (13.1 g/min).