A kind of preparation method of reinforced silicon carbide-alumina composite foam ceramics
A composite foam and silicon carbide technology, which is applied to ceramic products, other household appliances, household appliances, etc., can solve the problems of high sintering temperature and poor toughness of structural ceramics, achieve good economic and environmental benefits, reduce sintering temperature, and reduce costs. not high effect
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Embodiment 1
[0024] (1) The mass fraction is 60% industrial silicon carbide powder, 30% fused corundum powder, 5% kaolin, and 2% V 2 o 5 , use deionized water as the ball milling medium and mix well. After mixing, add appropriate amount of deionized water, in the planetary ball mill, at 300r·min -1 Ball milled for 6 hours to make a ceramic slurry with a solid phase mass fraction of 60% for later use. In addition, the slurry rheology agent sodium carboxymethyl cellulose, as well as the antifoaming agent tributyl phosphate and dispersing agent sodium polyacrylate are added in an amount of 1% by mass fraction;
[0025] (2) Make the polyurethane porous sponge into the size of diameter (25±1mm) and height (11±1mm), put it into NaOH solution (6.0mol·L -1 ) at 60°C for 10 hours, rinsed with deionized water and dried in air;
[0026] (3) immerse the polyurethane porous sponge after the hydrolysis treatment in the ceramic slurry and start slurrying, and the slurry is evenly attached to the surf...
Embodiment 2
[0031] (1) The mass fraction is 50% industrial silicon carbide powder, 35% fused corundum powder, 8% kaolin, and 4% Na 2O, use deionized water as the ball milling medium and mix well. After mixing, add appropriate amount of deionized water, in the planetary ball mill, at 300r·min -1 Ball milled for 6 hours to make a ceramic slurry with a solid phase mass fraction of 60% for later use. In addition, the slurry rheology agent sodium carboxymethyl cellulose, as well as the antifoaming agent tributyl phosphate and dispersing agent sodium polyacrylate are added in an amount of 1% by mass fraction;
[0032] (2) Make the polyurethane porous sponge into the size of diameter (25±1mm) and height (11±1mm), put it into NaOH solution (6.0mol·L -1 ) at 60°C for 10 hours, rinsed with deionized water and dried in air;
[0033] (3) immerse the polyurethane porous sponge after the hydrolysis treatment in the ceramic slurry and start slurrying, and the slurry is evenly attached to the surface ...
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