C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 41/85 (2006.01)
Patent
CA 2604458
There is disclosed a method of manufacturing a ceramic porous membrane in which a uniform porous membrane having less coarse and large pores and less defects and having a small membrane thickness can be obtained with less membrane formation times. There is disclosed a method of manufacturing a ceramic porous membrane in which a ceramic porous membrane is formed on inner wall surfaces of through holes of a cylindrical or lotus root-like porous base member. A porous base member 1 is installed so as to arrange the through holes of the base member in a vertical direction, a ceramic sol liquid 5 having a temperature difference of 50°C or less between the ceramic sol liquid and the porous base member 1 is supplied to the inner wall surface of the porous base member 1, the liquid supply is stopped at a stage where the ceramic sol liquid 5 is in excess of an upper end portion of the porous base member 1, and the ceramic sol liquid 5 is extracted from the downside of the porous base member 1. Subsequently, after the ceramic sol liquid 5 is completely extracted, a pressure difference is created so that a pressure on the side of an outer peripheral surface of the porous base member 1 is lower than that on the side of the inner wall surface of the porous base member 1.
L'invention concerne un processus de fabrication de membrane poreuse céramique, avec lequel on peut obtenir une mince membrane poreuse homogène avec réduction des pores grossiers et autres défauts grâce à un nombre réduit d'opérations de formation de membrane. L'invention concerne un processus de fabrication d'une membrane poreuse céramique avec lequel on obtient une membrane poreuse céramique sur la surface de paroi dans des trous traversants d'un matériau de base poreux en forme de racine de lotus ou tubulaire. Selon le processus, on dispose le matériau de base poreux (1) de sorte que les trous traversants de celui-ci correspondent à la direction verticale. Une solution sol céramique (5) présentant une différence de température de moins de 50°C par rapport au matériau de base poreux (1) est injectée sur la surface de la paroi interne du matériau de base poreux (1), et l'injection est interrompue lorsque la solution sol céramique (5) déborde au niveau d'une partie d'extrémité supérieure du matériau de base poreux (1). La solution sol céramique (5) est extraite du côté inférieur du matériau de base poreux (1). Au terme de l'extraction de la solution sol céramique (5), une différence de pression est appliquée de sorte que la pression sur le côté de la surface circonférentielle externe du matériau de base poreux (1) soit inférieure à celle observée sur le côté de la surface de la paroi interne du matériau de base poreux (1).
Tanaka Kei
Marks & Clerk
Ngk Insulators Ltd.
LandOfFree
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