Preparation method of porous ceramic-metal composite film material
A porous ceramic and metal composite technology is applied in the field of preparation of porous composite membrane materials, which can solve the problems of complex coating process and sintering process, poor adhesion of ceramic membrane layers, and poor smoothness of membrane layers, etc., so as to solve the problems of insufficient adhesion, The effect of improved contact area and high specific surface area
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Embodiment 1
[0034] A method for preparing a tubular porous ceramic-metal composite membrane material, comprising the following steps:
[0035] (1) A dense corundum tube is used as a rigid outer mold with an inner diameter of 15 mm and a length of 1100 mm; a silicone tube is used as an elastic inner mold with an outer diameter of 9 mm and a length of 1200 mm, and a polyurethane ring is used as an elastic head with an outer diameter of 15.5 mm. 8 mm inner diameter, 5 mm long.
[0036] (2) 20 g of Al with an average particle size of 2 μm 2 o 3 The powder was vigorously stirred with 100 ml of PVA (5 wt%) aqueous solution to form a stable suspension; the inner surface of the aforementioned corundum tube was impregnated five times using the impregnation technique, and dried at 120 °C for 2 h after each impregnation to form a 100 μm thick coating.
[0037] (3) Mix 320 g of stainless steel powder with an average particle size of 100 μm and stearic acid at a ratio of 5:1 by volume, and fill it ...
Embodiment 2
[0040] A method for preparing a tubular porous ceramic-metal composite membrane material, comprising the following steps:
[0041] (1) A quartz tube is used as a rigid outer mold with an inner diameter of 10 mm and a length of 1100 mm; a polyurethane tube is used as an elastic inner mold with an outer diameter of 6 mm and a length of 1200 mm; a silicone tube is used as an elastic head with an outer diameter of 10 mm and an inner diameter of 10 mm. 5 mm long and 5 mm long.
[0042] (2) 10 g of Al with an average particle size of 0.5 μm 2 o 3 Stir and mix the powder with 100 ml of PVB ethanol solution (1 wt%) to form a stable suspension; use spin coating technology to coat the inner surface of the aforementioned quartz tube twice, and dry at 80°C for 1 h after each spin coating to form a thick A film layer of about 50 μm.
[0043] (3) Fill 200 g of stainless steel powder with an average particle size of 20 μm into the annular cavity between the coated quartz tube and the poly...
Embodiment 3
[0046] A method for preparing a tubular porous ceramic-metal composite membrane material, comprising the following steps:
[0047] (1) A porous alumina tube is used as the rigid outer mold with an inner diameter of 6 mm and a length of 300 mm; a polyurethane tube is used as an elastic inner mold with an outer diameter of 3 mm and a length of 400 mm; a heat-shrinkable tube with a diameter of 12 mm is used as the coating protection The sleeve is heat-shrinkable at a temperature of 80 °C for 2 hours; a silicone tube is used as an elastic head, with an outer diameter of 6 mm, an inner diameter of 3 mm, and a length of 5 mm.
[0048] (2) TiO with an average particle size of 0.5 μm 2 The powder was stirred and mixed with 1 wt% MC aqueous solution to form a stable suspension; the inner surface of the porous tube was coated once by dipping technology, and then dried at 120 °C for 2 h to form a TiO with a thickness of about 20 μm. 2 film layer.
[0049] (3) Fill 25 g of nickel powder...
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