an al 2 o 3 -tio 2 -fe 2 o 3 Gradient porous structure ceramic ultrafiltration membrane and preparation method thereof
A technology of al2o3-tio2-fe2o3 and ceramic ultrafiltration membrane, which is applied in ultrafiltration, chemical instruments and methods, membranes, etc., can solve the problems of easy collapse of sintered body and high sintering temperature of titanium oxide ceramics, and achieve cost saving and process The effect of simple process and wide application prospects
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Embodiment 1
[0034] an Al 2 O 3 -TiO 2 -Fe 2 O 3 The preparation method of the gradient porous structure ceramic ultrafiltration membrane is specifically implemented according to the following steps:
[0035] S1: Add 0.1-100 μm titanium powder (7% by mass), 50-100 nm iron powder (3% by mass), and 10-500 μm alumina powder (2% by mass) into the ball mill in sequence ), gelatin (mass fraction of 2%), dispersant (mass fraction of 3%), deionized water 83%, zirconia balls;
[0036] S2: put it in an oven for 1 to 24 hours, control the temperature at 30 to 100°C, and ball mill for 24 to 72 hours;
[0037] S3: Forming of the green body: Pour the prepared ceramic slurry into the prepared mold, put it into the freeze-drying machine, freeze-dry it for 12-72 hours, and control the temperature of the freeze-drying machine at -10°C ~-60℃;
[0038] S4: sintering process: put the freeze-dried green body into a crucible, and coat it with alumina powder with a particle size of 200 nm;
[0039] S5: Pu...
Embodiment 2
[0042] an Al 2 O 3 -TiO 2 -Fe 2 O 3 The preparation method of the gradient porous structure ceramic ultrafiltration membrane is specifically implemented according to the following steps:
[0043] S1: Add 0.10 μm titanium powder (mass fraction 5%), 100 nm iron powder (mass fraction 8%), 2.5 μm alumina powder (mass fraction 5%), gelatin (mass fraction 5%) into the ball mill jar in turn 3%), dispersant (2% by mass), 77% deionized water, zirconia balls;
[0044] S2: put it in an oven for 1 to 24 hours, control the temperature at 30 to 100°C, and ball mill for 24 to 72 hours;
[0045]S3: Forming of the green body: Pour the prepared ceramic slurry into the prepared mold, put it into the freeze-drying machine, freeze-dry it for 72 hours, and control the temperature of the freeze-drying machine at -10°C;
[0046] S4: sintering process: put the freeze-dried green body into a crucible, and coat it with alumina powder with a particle size of 100 nm;
[0047] S5: Put the crucible i...
Embodiment 3
[0051] an Al 2 O 3 -TiO 2 -Fe 2 O 3 The preparation method of the gradient porous structure ceramic ultrafiltration membrane is specifically implemented according to the following steps:
[0052] S1: Add 0.5-100 μm titanium powder (1% by mass), 50-100 nm iron powder (10% by mass), and 100-500 μm alumina powder (1% by mass) into the ball mill in sequence ), gelatin (mass fraction of 5%), dispersant (mass fraction of 5%), deionized water 78%, zirconia balls;
[0053] S2: put it in an oven for 1 to 24 hours, control the temperature at 30 to 100°C, and ball mill for 24 to 72 hours;
[0054] S3: Forming of the green body: Pour the prepared ceramic slurry into the prepared mold, put it into the freeze-drying machine, freeze-dry it for 72 hours, and control the temperature of the freeze-drying machine at -10°C;
[0055] S4: sintering process: put the freeze-dried green body into a crucible, and coat it with alumina powder with a particle size of 50 nm;
[0056] S5: Put the cru...
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