Oxynitride glasses

Abstract

The present work is a review of the numerous nitridation experiments which have been carried out in different glass forming Systems. After a brief introduction to the topic of the solubility of nitrogen in glass melts, the nitridation procedures and the different ways of incorporating nitrogen into the glass network are described. Also considered is the increasing cross-linking structure due to the incoφOΓation of nitrogen. This involves a rise of the transition temperature, a decrease of the thermal expansion coefficient, and an improvement of the mechanical properties as well as of the chemical durability of the oxynitride glasses, depending closely on the nitrogen content. Some experiments on preparation of oxynitride glasses via the sol-gel procedure are also described. Due to their properdes the oxynitride glasses have been employed in several specific technical fields.