Title

Preparation and Characterization of Lithium Phosphorus Oxynitride Glass

Abstract

Lithium phophorus oxynitride (Li-P-O-N) glass containing up to 12.6 wt% nitrogen has been prepared by melting LiPO3 at 700 to 800 °C in a flowing ammonia atmosphere. The chemical durability of the glass increased more than four orders of magnitude with nitrogen addition. The softening temperature, refractive index, glass forming ability and Vickers hardness also increased, while the thermal expansion coefficient decreased with increasing nitrogen content. Chemical analyses and infrared spectra suggest that nitrogen replaces the bridging oxygen in the PO4 tetrahedra. Li-P-O-N glasses containing less than 3.4 wt% nitrogen have been devitrified, but the crystalline phases could not be identified. Various properties are compared for Li-P-O-N and Na-P-O-N glasses.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Lithium Compounds; Optical Properties; Phosphorus Compounds; Glass Composition; Nitrogen Addition; Oxynitride Formation

International Standard Serial Number (ISSN)

0022-3093; 1873-4812

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1986 Elsevier, All rights reserved.

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