Nitrogen Dissolution in Sodium Alkaline-Earth Metaphosphate Melts

Author

Mohan Rajaram
D. E. Day, Missouri University of Science and TechnologyFollow

Abstract

Phosphorus oxynitride glasses were prepared by remelting (5O –X)Na₂O ·XBaO · 50P₂O₅, X = 0, 10, 20, 25, and 30, and 30Na₂O · 20MO · 50P₂O₅, M = Mg, Ca, Sr, and Ba‘, glasses in anhydrous ammonia. The nitrogen content depends upon the temperature and time of remelting in ammonia and the concentration and size of the alkaline-earth ion. Nitriding the starting glass decreased the dissolution rate in deionized water and thermal expansion coefficient and increased the dilatometric softening temperature and refractive index. The dissolution rate of the base glass in deionized water depended upon the concentration and size of the alkaline-earth ion, but for nitrided glasses, it was essentially independent of the alkaline-earth cation. The thermal expansion coefficient for all the oxynitride glasses decreased with increasing alkaline-earth concentration and cation field strength.

Recommended Citation

M. Rajaram and D. E. Day, "Nitrogen Dissolution in Sodium Alkaline-Earth Metaphosphate Melts," Journal of the American Ceramic Society, vol. 70, no. 4, pp. 203 - 207, Wiley-Blackwell, Apr 1987.

The definitive version is available at https://doi.org/10.1111/j.1151-2916.1987.tb04968.x

Department(s)

Materials Science and Engineering

Keywords and Phrases

Glass - Physical Properties; Nitrogen - Dissolution; Phosphates - Chemical Reactions; Metaphosphate Melts; Phosphorus Oxynitride Glasses; Remelting, Glass Manufacture

International Standard Serial Number (ISSN)

0002-7820; 1551-2916

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1987 Wiley-Blackwell, All rights reserved.

Publication Date

01 Apr 1987