Preparation method of disc type full silicon carbide filtering membrane
A technology of full silicon carbide and filter membrane, applied in ceramic products, applications, household appliances, etc., to achieve the effect of large separation flux, strong hydrophilicity and oil repellency, and long service life
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[0037] Example 1
[0038] 1) Preparation of dish-type full silicon carbide filter membrane support
[0039] Weigh 100 parts of coarse silicon carbide powder I with an average particle size of 40μm, 7 parts of silicon carbide fine powder II with an average particle size of 3μm and a purity greater than 98%, and 4 parts of sodium carboxymethylcellulose with a molecular weight of 13000 and a purity greater than 98% , 12 parts of carbon black with an average particle size of 0.1-10μm, stir and dissolve the sodium carboxymethyl cellulose in 40℃ warm water, and then add silicon carbide coarse powder Ⅰ, silicon carbide fine powder Ⅱ and carbon black in turn. The mixer mixes evenly; among them, the SEM image of silicon carbide fine powder II is as follows figure 2 As shown, the average particle size of the particles is about 3μm, and the particle size is relatively consistent;
[0040] The uniformly mixed mud is dried, sieved, and then loaded into the forming mold. The green body is obtain...
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[0047] Example 2
[0048] 1) Preparation of dish-type full silicon carbide filter membrane support
[0049] Weigh 100 parts of coarse silicon carbide powder I with an average particle size of 45μm, 6 parts of silicon carbide fine powder II with an average particle size of 2μm and a purity greater than 98%, and 3 parts of sodium carboxymethyl cellulose with a molecular weight of 15000 and a purity greater than 98%. , 14 parts of carbon black with an average particle size of 0.1-10μm, stir and dissolve sodium carboxymethyl cellulose in warm water at 40°C, then add silicon carbide coarse powder I, silicon carbide fine powder II and carbon black in turn, and mix at high speed. Mix the feeder evenly;
[0050] The uniformly mixed mud is dried, sieved, and then loaded into the forming mold. The green body is obtained by dry pressing on a large tonnage press. The pressure of dry pressing is two-way pressure, and the pressure is 8MPa;
[0051] Use silicon carbide fine powder II, polyvinyl alc...
Example Embodiment
[0057] Example 3
[0058] 1) Preparation of dish-type full silicon carbide filter membrane support
[0059] Weigh 100 parts of coarse silicon carbide powder I with an average particle size of 30 μm, 9 parts of silicon carbide fine powder II with an average particle size of 1 μm and a purity greater than 98%, and 4 parts of sodium carboxymethyl cellulose with a molecular weight of 12000 and a purity greater than 98% , 11 parts of carbon black with an average particle size of 0.1-10μm, stir and dissolve sodium carboxymethyl cellulose in warm water at 40°C, then add silicon carbide coarse powder I, silicon carbide fine powder II and carbon black in sequence, and mix at high speed. Mix the feeder evenly;
[0060] The uniformly mixed mud is dried, sieved, and then loaded into the forming mold. The green body is obtained by dry pressing on a large tonnage press. The pressure of dry pressing is bidirectional pressure, and the pressure is 12MPa;
[0061] Use silicon carbide fine powder II, p...
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