Refractory compositions of monoclinic zirconia and articles made therefrom, showing mechanical strength at elevated temperatures and an improved thermal shock resistance

摘要

A refractory composition comprising, by weight:… (A) at least 70% of an aggregate based on refractory oxides,… (B) from 7 to 25% of a matrix consisting of particles of a specified particle size, the said matrix comprising… (i) at least one oxide chosen from the group consisting of Al2O3 and Cr2O3 and forming 6 to 24% of the composition,… (ii) monoclinic zirconia in a proportion forming from 1 to 9% of the composition, and… (iii) not more than 1% of silica relative to the weight of the composition; and… (C) from 0 to 6% in all of one or more additives. …??Use in the glassmaking and metallurgical industries. …IMAGE…