PREPARATION AND PROPERTIES OF ALUMINOSILICATE GLASSES CONTAINING N ANDF

摘要

Sialon and silicon nitride ceramics contain intergranular glass as a result of the need for oxide sintering additives. This paper reviews factors affecting the properties of such glasses and indicates how composition variables can be used in additive equations to understand important predictors of property values. A modified method for calculating glass crosslink densities is given which takes into account increased partitioning of aluminium from the network to a modifier role as fluorine content increase. This explains changes in glass transition temperature with composition but not changes in Young's modulus which are controlled by glass compactness (packing density).