PROCESS FOR THE PREPARATION OF SIALON PRODUCTS

摘要

The invention relates to a process for the preparation of sialon products by mixing zeolites with carbon or a carbon-containing compound and subjecting the obtained mixture to a carbothermic reduction in a nitrogen containing, flowing gas at a temperature in the range of 1350-1700 DEG C and to sialon products, having an average nitrogen content in the bulk of 25-31% by weight and an active surface of 1-15 m<2>/g (measured according to the BET method) and to shaped ceramic materials and catalyst carriers therefrom.