Porous Materials with Hybrid Structure Produced by Nitriding Partially-Sintered Silicon

Abstract:

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New porous materials with hybrid pore structure “Fibers-In-Pores” structure were produced by developing Si3N4 whiskers in pores of partially-sintered silicon by nitriding. Because silicon and Si3N4 have excellent heat resistance, the proposed porous materials are expected to utilize high-temperature applications such as gas filters. Porous silicon was produced by sintering Si powder at 1300°C for 1 h in a stream of Ar gas. Porous Si bodies were nitrided at 1300°C for 1 h with N2 gas to develop long Si3N4 whiskers in pores of partially-sintered silicon. Specific surface area was increased and gas permeability was decreased by applying the nitridation process at 1300°C.

Info:

Periodical:

Materials Science Forum (Volumes 620-622)

Edited by:

Hyungsun Kim, JienFeng Yang, Tohru Sekino and Soo Wohn Lee

Pages:

765-768

DOI:

10.4028/www.scientific.net/MSF.620-622.765

Citation:

M. Nanko "Porous Materials with Hybrid Structure Produced by Nitriding Partially-Sintered Silicon", Materials Science Forum, Vols. 620-622, pp. 765-768, 2009

Online since:

April 2009

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$35.00

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