| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an inorganic composite hollow tube composed of a support constituted of a porous ceramic hollow tube and a separation layer made of a glass material, by which the inorganic composite hollow tube having a desired hole diameter, sharp hole diameter distribution and high permeation flow velocity can be produced without making the separation layer thicker. SOLUTION: When the inorganic composite hollow tube, in which a glass layer is provided on the outer peripheral surface of the porous ceramic hollow tube obtained by a sintering method, is produced, the glass layer is formed by applying paste on the outer peripheral surface of the porous ceramic hollow tube and then melting glass by raising the temperature of the outer peripheral part of the porous ceramic hollow tube to the melting temperature of the glass. Heating of the outer peripheral part of the hollow tube to the melting temperature of the glass is performed preferably by a gas burner or high frequency induction heating. After melting the glass, a porous glass thin film is formed on the surface of the porous ceramic hollow tube by subjecting a formed glass layer to a phase separation treatment and an acid treatment. COPYRIGHT: (C)2007,JPO&INPIT
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