Iron Polyphosphate Glasses for Waste Immobilization
Iron polyphosphate glasses resist attack by water, can dissolve large concentrations of species that are otherwise insoluble in borosilicate glass melts, and can be processed at relatively low temperatures (1000-1200°C), and so are viable hosts for vitrifying hazardous and radioactive wastes. The properties of iron polyphosphate glasses depend on the distributions of phosphate anions and the nature of the bonds between those anions and various metal polyhedra, and quantitative information can be obtained about those structures using a variety of spectroscopic, diffraction, and chromatographic techniques. This structural information helps explain compositional trends in properties, including dissolution rates, electrical conductivity, thermal properties and crystallization tendency. Studies of waste forms made with low activity and high level wastes are reviewed and related back to an understanding of the structures and properties of simpler iron polyphosphate glasses.
R. K. Brow et al., "Iron Polyphosphate Glasses for Waste Immobilization," International Journal of Applied Glass Science, vol. 11, no. 1, pp. 4-14, Blackwell Publishing Inc., Jan 2020.
The definitive version is available at https://doi.org/10.1111/ijag.13565
Materials Science and Engineering
Nuclear Engineering and Radiation Science
Keywords and Phrases
Durability; Glass Forming Melts; Glass Forming Systems; Phosphate; Properties; Redox State; Structure; Surfaces
International Standard Serial Number (ISSN)
Article - Journal
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01 Jan 2020