Preparation method of alumina ceramic material
A technology of alumina ceramics and raw materials, which is applied in the field of preparation of alumina ceramic materials, can solve the problems of increased production cost, high sintering temperature, and large investment in kiln furniture, etc., and achieve the goals of prolonging service life, low sintering temperature, and improving ball milling activity Effect
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Embodiment 1
[0030] Weigh 9050kg of alumina powder, 502kg of kaolin, 51kg of light calcium carbonate, 397kg of magnesium carbonate, and 3kg of ISOBAM-110 respectively, place them in a polyurethane ball mill tank, add 7780kg of deionized water as the dispersion medium, and ball mill for 38 hours; then add 3kg of ISOBAM-104 , ball milled again for 7 hours to obtain the slurry; when the particle size of the slurry reaches D50 of 1.31 μm and D90 of 1.87 μm, it is dried at a temperature of 75°C for 20 hours and ground for 1 hour, and then passed through a 200-mesh sieve to remove iron to obtain a powder; add 60kg of magnesium stearate, mixed evenly; under the pressure of 4.0MPa, the holding time is 50s, pressed into a green body; the green body was sintered at a high temperature of 1560°C for 4 hours to obtain the product.
[0031] In the ball milling process, the grinding balls are alumina balls, and the mass of the alumina balls is 42234kg.
[0032] Product performance parameters are: density...
Embodiment 2
[0034] Weigh 9325kg of alumina powder, 424kg of kaolin, 13kg of light calcium carbonate, 242kg of magnesium carbonate and 2kg of ISOBAM-110 respectively, place them in a polyurethane ball mill tank, add 8000kg of deionized water as the dispersion medium, and ball mill for 40 hours; then add 2kg of ISOBAM-104 , ball milled again for 8 hours to obtain the slurry; when the particle size of the slurry reached D50 to 1.45 μm and D90 to 2.14 μm, it was dried at 80°C for 24 hours and ground for 2 hours, then passed through a 200-mesh sieve to remove iron to obtain a powder; add 40kg of barium stearate, mixed evenly; under the pressure of 5.0MPa, the holding time is 1min, pressed into a green body; the green body was sintered at a high temperature of 1570°C for 3 hours to obtain the product.
[0035] In the ball milling process, the grinding balls are agate balls, and the mass of the agate balls is 40000kg.
[0036] The performance parameters of the product are: density 3.801g / cm 3 ±...
Embodiment 3
[0038] Weigh 9127kg of alumina powder, 392kg of kaolin, 157kg of light calcium carbonate, 324kg of magnesium carbonate, and 1kg of ISOBAM-110 respectively, place them in a polyurethane ball mill tank, add 8180kg of deionized water as the dispersion medium, and ball mill for 42 hours; then add 1kg of ISOBAM-104 , ball milled again for 9 hours to obtain the slurry; when the particle size of the slurry reached D50 to 1.42 μm and D90 to 2.03 μm, it was dried at 85°C for 28 hours and ground for 1.5 hours, then passed through a 200-mesh sieve to remove iron to obtain a powder; in the powder Add 80kg of magnesium stearate, mix evenly; under the pressure of 6.0MPa, hold the pressure for 70s, press into a green body; sinter the green body at a high temperature of 1580°C for 2 hours to obtain the product.
[0039] During the ball milling process, the grinding balls are mixed with alumina balls and agate balls at a mass ratio of 1:1. The total mass of alumina balls and agate balls is 3817...
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