2320 高温水素分離用多孔質炭化ケイ素支持基材の開発(S32-2 セラミックスおよびセラミックス系複合材料(2),S32 セラミックスおよびセラミックス系複合材料)

概要

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Porous silicon carbide membrane supports for hydrogen separation, which was sintered at 1500-1800℃, have been prepared by using different pressures of cold isostatic press and different amount of alumina additive (0-4%). In this study, the relationship among the processing factors, pore size and microstructure has been examined. The pore size and particle size of membrane support without alumina have increased with increasing sintering temperature. On the other hand, SiC membrane support with 4% alumina showed the retaining of pore size around 100nm and small particles, regardless of sintering temperatures. In addition, their stability under water vapor below 1000℃ was investigated. The surface of all membrane supports after water-vapor oxidation at 6008℃ was composed from silicon oxycarbide, confirmed by X-ray photoelectron spectroscopy. This indicates that the complete oxidation to silica did not occur. Therefore, porous silicon carbide is expected to be useful as membrane support.
社団法人日本機械学会の論文
2005-09-18