Bottom-Up Routes to Porous Silicon Carbide

Abstract:

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We report on constructive methods providing a large range of high purity porous SiC products. All methods are based on modified sol-gel processes combined with carbothermal re¬duction. We obtain monodisperse regular pores of well defined diameters by using carbon sphere templates which are removed after SiC infiltration. A different way is a sol-gel based conversion of graphite bodies into SiC, which transfers the porosity from the graphite matrix into the final SiC product. Thus a large variety of porosity features are available, originating either from natural poro¬sity of graphite or from priorly created nano-/ microstructures in the carbonaceous base material. Whereas all our pristine porous sol-gel derived silicon carbide products are semi-insulating, doping is possible, during the growth to modifiy the electrical and optical properties.

Info:

Periodical:

Materials Science Forum (Volumes 615-617)

Edited by:

Amador Pérez-Tomás, Philippe Godignon, Miquel Vellvehí and Pierre Brosselard

Pages:

637-640

DOI:

10.4028/www.scientific.net/MSF.615-617.637

Citation:

S. Greulich-Weber and B. Friedel, "Bottom-Up Routes to Porous Silicon Carbide", Materials Science Forum, Vols. 615-617, pp. 637-640, 2009

Online since:

March 2009

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$35.00

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