Factors Affecting Nitrogen Dissolution in Sodium Metaphosphate Glass

Author

Yongren B. Peng
D. E. Day, Missouri University of Science and TechnologyFollow

Abstract

The preparation of sodium phosphate oxynitride (Na-P-O-N) glasses was investigated in dry ammonia, forming gas and 90% N₂+ 10% CO atmospheres. Significant nitrogen dissolution, up to 13 wt% in a NaPO₃ melt, occurred only in ammonia. The kinetics of nitrogen dissolution was studied as a function of remelting time (1 to 96 h) and temperature (660° to 760°C). Higher temperature accelerates nitrogen dissolution, but the temperature should not exceed 760°C. Great improvement in chemical durability occurs with nitrogen dissolution in a NaPO₃ melt. Other property changes reported include softening temperature, thermal expansion coefficient, refractive index, microhardness, etc. A double chain structure model is proposed for the Na-P-O-N glass.

Recommended Citation

Y. B. Peng and D. E. Day, "Factors Affecting Nitrogen Dissolution in Sodium Metaphosphate Glass," Journal of the American Ceramic Society, vol. 70, no. 4, pp. 232 - 236, Wiley-Blackwell, Apr 1987.

The definitive version is available at https://doi.org/10.1111/j.1151-2916.1987.tb04973.x

Department(s)

Materials Science and Engineering

Keywords and Phrases

Glass - Physical Properties; Nitrogen - Dissolution; Phosphates - Chemical Reactions; Double Chain Structure Model; Sodium Metaphosphate Glass; 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