Method for preparing mullite whisker-reinforced alumina hollow sphere porous ceramic
A technology of alumina hollow balls and mullite whiskers, which is applied in ceramic products, applications, household appliances, etc., can solve the problems of reducing the weight of the kiln, energy saving and consumption reduction, and high bulk density, achieving low cost and improving use. Long life, excellent high temperature resistance
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[0015] Example 1:
[0016] The mullite whisker-reinforced alumina hollow sphere porous ceramics given in this example are composed of: 70 kg of alumina hollow spheres with a particle size of 3-0.1 mm, 19 kg of alumina fine powder with a particle size of less than 0.074 mm, 9.2kg of silica fine powder with a particle size of less than 0.045mm, and 1.8kg of aluminum fluoride fine powder with a particle size of less than 0.074mm. Using starch as a binding agent and a pore-forming agent, through kneading, molding, drying and sintering, the alumina hollow sphere porous ceramics reinforced with mullite whiskers are obtained. The specific operation steps are as follows:
[0017] Step 1, place the above-mentioned alumina hollow spheres in the mixer, add 5kg of water and 6kg of starch, and mix at 160r / min for 15 minutes; then add the above-mentioned alumina fine powder, silicon dioxide micropowder, aluminum fluoride Fine powder, continue to mix at 160r / min for 15 minutes to obtain the...
Example Embodiment
[0022] Example 2:
[0023] The alumina hollow sphere porous ceramics reinforced by mullite whiskers provided in this example are composed of: 68 kg of alumina hollow spheres with a particle size of 3-0.1 mm, 21 kg of alumina fine powder with a particle size of less than 0.074 mm, 9kg of silica fine powder with a particle size of less than 0.045mm, and 2kg of aluminum fluoride fine powder with a particle size of less than 0.074mm. Using starch as a binding agent and a pore-forming agent, through kneading, molding, drying and sintering, the alumina hollow sphere porous ceramics reinforced with mullite whiskers are obtained. The specific operation steps are as follows:
[0024] Step 1, place the above-mentioned alumina hollow spheres in a mixer, add 6kg of water and 10kg of starch, and mix at 160r / min for 15 minutes; then add above-mentioned alumina fine powder, silicon dioxide micropowder, aluminum fluoride Fine powder, continue to mix at 160r / min for 15 minutes to obtain the m...
Example Embodiment
[0029] Example 3:
[0030] The mullite whisker-reinforced alumina hollow sphere porous ceramics given in this example are composed of: 65 kg of alumina hollow spheres with a particle size of 3-0.1 mm, 22 kg of alumina fine powder with a particle size of less than 0.074 mm, 10.6 kg of silica fine powder with a particle size of less than 0.045 mm, and 2.4 kg of aluminum fluoride fine powder with a particle size of less than 0.074 mm. Using starch as a binding agent and a pore-forming agent, through kneading, molding, drying and sintering, the alumina hollow sphere porous ceramics reinforced with mullite whiskers are obtained. The specific operation steps are as follows:
[0031] Step 1, place the above-mentioned alumina hollow spheres in the mixer, add 7kg of water and 8kg of starch, and mix at 160r / min for 15 minutes; then add the above-mentioned alumina fine powder, silicon dioxide micropowder, aluminum fluoride Fine powder, continue to mix at 160r / min for 15 minutes to obtai...
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