Corrosion of Phosphorus Oxynitride Glasses in Water and Humid Air |
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Authors: | BRUCE C. BUNKER GEORGE W. ARNOLD MOHAN RAJARAM DELBERT E. DAY |
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Affiliation: | Sandia National Laboratories, Albuquerque, New Mexico 87185;University of Missouri, Rolla, Missouri 65401 |
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Abstract: | Phosphorus oxynitride (PON) glasses, prepared by remelting phosphate glasses in anhydrous ammonia vapor, are more resistant to dissolution in water and corrosion in humid environments than the parent phosphate glasses. The chemical durability of PON glasses is directly related to their nitrogen content. Solution analyses, pH stat titrations, and hydrogen depth profiles suggest that nitrogen improves the durability of phosphate glasses by cross-linking the polymeric phosphate chains in the network structure. |
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