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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.

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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.

Item Type: Conference or Workshop Item (Paper)
Subjects: Q Science / természettudomány > QC Physics / fizika
Q Science / természettudomány > QD Chemistry / kémia
Depositing User: Erika Bilicsi
Date Deposited: 12 Oct 2012 09:37
Last Modified: 12 Oct 2012 09:37
URI: http://real.mtak.hu/id/eprint/3108

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