Title

Preparation of Phosphorus Oxynitride Glasses

Editor(s)

Potter, B. G. and Zanotto, E. D. and Zwanziger, J. W.

Abstract

The preparation of oxynitride glass by melting sodium metaphosphate in anhydrous ammonia is described. Glasses containing up to ≈ 12 wt% nitrogen were prepared with the nitrogen content depending upon the melting temperature, time, and ammonia flow rate through the furnace. Nitriding the NaPO3 starting glass decreased the dissolution rate in water and thermal expansion coefficient while increasing the dilatometric softening temperature, glass transition temperature, refractive index, and microhardness. Oxynitride glasses were considerably more difficult to crystallize than the starting NaPO3 glass. Models for nitrogen dissolution are used to calculate the glass composition from the measured weight loss and analyzed nitrogen content.

Department(s)

Materials Science and Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1986 Elsevier, All rights reserved.


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