Preparation method of high-sphericity-degree silicon carbide powder for ceramic membrane
A technology of silicon carbide powder and high sphericity is applied in the field of preparation of silicon carbide powder with high sphericity for ceramic membranes, which can solve the problems of high sintering temperature, poor controllability, uncontrollable particle size, etc., and achieves low calcination temperature. Effect
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Embodiment 1
[0021] (1) Pretreatment of silicon powder
[0022] a Mix silicon powder, cellulose ether, and water according to the mass ratio of 200:1:1000, stir evenly, pour it into a measuring cylinder, let it stand for 3 minutes, take the solution below half of the liquid level of the measuring cylinder, and put it in an oven at 105°C The dried silicon powder is obtained.
[0023] b Mix the dried silicon powder obtained in the above steps with hydrofluoric acid at a mass ratio of 1:1, let it stand for 24 hours, wash it with distilled water and dry it.
[0024] (2) Preparation of silicon powder precursor
[0025] The silicon powder obtained in step (1) was mixed with glucose and distilled water according to the mass ratio of 1:3.5:4 for 30 minutes, then placed in a water bath at 90°C for 20 minutes, and finally dried in an oven at 105°C for 12 hours. The samples were ground into powder to obtain silicon powder precursor.
[0026] (3) Carbonization of precursors
[0027] Put the silico...
Embodiment 2
[0033] (1) Pretreatment of silicon powder
[0034] a Mix silicon powder, cellulose ether, and water according to the mass ratio of 200:4:1000, stir evenly, pour it into a measuring cylinder, let it stand for 3 minutes, take the solution below half the liquid level of the measuring cylinder, and put it in an oven at 105°C The dried silicon powder is obtained.
[0035] b Mix the dried silicon powder obtained in the above steps with hydrofluoric acid at a mass ratio of 1:5, let it stand for 24 hours, wash it with distilled water and dry it.
[0036] (2) Preparation of silicon powder precursor
[0037] The silicon powder obtained in step (1) was mixed with glucose and distilled water according to the mass ratio of 1:5:5.5 and stirred for 40 minutes, then placed in a water bath at 90°C for 25 minutes, and finally dried in an oven at 105°C for 20 hours. The samples were ground into powder to obtain silicon powder precursor.
[0038] (3) Carbonization of precursors
[0039] Put t...
Embodiment 3
[0045] (1) Pretreatment of silicon powder
[0046] a Mix silicon powder, cellulose ether, and water according to the mass ratio of 200:8:1000, stir evenly, pour it into a measuring cylinder, let it stand for 3 minutes, take the solution below half of the liquid level of the measuring cylinder, and put it in an oven at 105°C The dried silicon powder is obtained.
[0047] b Mix the dried silicon powder obtained in the above steps with hydrofluoric acid at a mass ratio of 1:10, let it stand for 24 hours, clean it with distilled water and dry it.
[0048] (2) Preparation of silicon powder precursor
[0049] The silicon powder obtained in step (1) was mixed with glucose and distilled water according to the mass ratio of 1:6:6.5 and stirred for 45 minutes, then placed in a water bath at 90°C for 30 minutes, and finally dried in an oven at 105°C for 24 hours. The samples were ground into powder to obtain silicon powder precursor.
[0050] (3) Carbonization of precursors
[0051] ...
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