Studies on atmospheric ageing of nanosized silicon nitride powders

Szépvölgyi, János and Mohai, Ilona and Gubicza, Jenő (2004) Studies on atmospheric ageing of nanosized silicon nitride powders. In: 8th Conference and Exhibition of the European Ceramic Society, 2003. június 29. - július 3., Istanbul, Turkey.

PDF 1006643.pdf Restricted to Registered users only Download (198kB) | Request a copy

Abstract

Ageing of nanosized silicon nitride powder produced by the vapor phase reaction of silicon tetrachloride and ammonia has been studied in argon gas, in dry air and in air of 80% humidity, respectively, for 3 to 540 days. No remarkable changes were observed either in the bulk or the surface properties on storage in argon gas for 90 days. However, samples stored in dry air and humid air, respectively, exhibited remarkable oxidation and formation of N-H species. It was proved that nanosized silicon nitride powders should be stored and processed in oxygen-free conditions.

Actions (login required)

Edit Item