Preparation method for alumina ceramic
A technology of alumina ceramics and alumina, which is applied in the field of preparation of alumina ceramics, can solve the problems of alumina ceramics to be improved in density, high equipment cost, poor bending strength, etc., and achieve high bonding strength, high specific surface area, Effect of improving toughness and bending strength
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Embodiment 1
[0036] Preparation of sintering aids:
[0037] Take 400g of rice husk and ignite to get rice husk ash, put the rice husk ash into the glass tank, add 500mL of 30% sodium hydroxide solution into the glass tank to soak the rice husk ash, after soaking for 10min, then put it into the glass tank Add 600mL of sulfuric acid solution with a mass fraction of 20%, heat up to 90°C, start the stirrer to stir at a speed of 70r / min, keep the reaction for 20min, filter and remove the filter residue to obtain a gel;
[0038] Wash the above-mentioned gel with deionized water for 3 times, then put the washed gel into an oven, heat up to 100°C, and dry for 45 minutes to obtain a dry gel, then place the dry gel in a nanometer high-pressure pulse pulverizer, After pulverizing for 10 minutes, nano-gel powder is obtained, and the nano-gel powder and chromium oxide are mixed at a mass ratio of 3:1 to obtain a sintering aid, which is set aside;
[0039] Preparation of alumina seed liquid:
[0040] ...
Embodiment 2
[0047] Preparation of sintering aids:
[0048] Take 450g of rice husk and ignite to get rice husk ash, put the rice husk ash into the glass tank, add 550mL sodium hydroxide solution with a mass fraction of 30% to the glass tank to soak the rice husk ash, soak for 12min, then pour it into the glass tank Add 700mL of sulfuric acid solution with a mass fraction of 20%, heat up to 95°C, start the stirrer to stir at a speed of 75r / min, keep warm for 25min, filter and remove the filter residue to obtain a gel;
[0049] Wash the above-mentioned gel 4 times with deionized water, then put the washed gel into an oven, heat up to 105°C, and dry for 50 minutes to obtain a dry gel, then place the dry gel in a nano high-pressure pulse mill, After pulverizing for 12 minutes, nano gel powder is obtained, and the nano gel powder and chromium oxide are mixed at a mass ratio of 3:1 to obtain a sintering aid, which is set aside;
[0050] Preparation of alumina seed liquid:
[0051] Put 750mL of...
Embodiment 3
[0058] Preparation of sintering aids:
[0059] Take 500g of rice husk and ignite to get rice husk ash, put the rice husk ash into the glass tank, add 600mL of sodium hydroxide solution with a mass fraction of 30% to the glass tank to soak the rice husk ash, after soaking for 15min, then pour it into the glass tank Add 800mL of sulfuric acid solution with a mass fraction of 20%, heat up to 100°C, start the stirrer to stir at a speed of 80r / min, keep the reaction for 30min, filter and remove the filter residue to obtain a gel;
[0060] Wash the above gel 5 times with deionized water, then put the washed gel into an oven, heat up to 110°C, and dry for 55 minutes to obtain a dry gel, which is placed in a nano high-pressure pulse mill, After pulverizing for 15 minutes, nano gel powder is obtained, and the nano gel powder and chromium oxide are mixed at a mass ratio of 3:1 to obtain a sintering aid, which is set aside;
[0061] Preparation of alumina seed liquid:
[0062] Put 800m...
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Abstract
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