Preparation method of pure silicon carbide porous ceramic membrane
A technology of porous ceramic membrane and pure silicon carbide, which is applied in the direction of ceramic products, applications, household appliances, etc., to achieve the effect of broadening the scope of use, improving high temperature resistance, and good high temperature resistance
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[0025] Example 1:
[0026] 1) Forming of silicon carbide blank
[0027] A1. Selection of raw materials: silicon carbide powder I, silicon carbide powder II, low-density polyethylene, and dibutyl phthalate are selected for use at a mass ratio of 100:10:4:0.1;
[0028] B1. Mixing of raw materials: raw materials selected in proportion are mixed at a temperature of 120°C to form a uniform mixture;
[0029] C1. Molding of silicon carbide blanks: Put the mixture obtained in step B1 into an extruder to form a multi-channel tubular blank.
[0030] 2) Coating of silicon carbide film
[0031] A2. Preparation of silicon carbide film slurry: water, silicon carbide powder III, silicon carbide powder VI, and cellulose ether are mixed uniformly at a mass ratio of 100:30:3:0.08 to prepare silicon carbide film slurry;
[0032] B2. Coating of silicon carbide film layer: inject the film layer slurry into the channel of the raw embryo prepared according to step 1), and flow for 15 seconds to obtain the silic...
Example Embodiment
[0040] Example 2:
[0041] 1) Forming of silicon carbide blank
[0042] A1. Selection of raw materials: silicon carbide powder I, silicon carbide powder II, low-density polyethylene, and dibutyl phthalate are selected for use at a mass ratio of 100:13:6:0.3;
[0043] B1. Mixing of raw materials: raw materials selected in proportion are mixed at a temperature of 120°C to form a uniform mixture;
[0044] C1. Molding of silicon carbide blanks: Put the mixture obtained in step B1 into an extruder to form a multi-channel tubular blank.
[0045] 2) Coating of silicon carbide film
[0046] A2. Preparation of silicon carbide film slurry: water, silicon carbide powder III, silicon carbide powder VI, and cellulose ether are mixed uniformly in a mass ratio of 100:35:4:0.3 to prepare silicon carbide film slurry;
[0047] B2. Coating of silicon carbide film layer: Inject the film layer slurry into the channel of the plain embryo prepared according to step 1), and flow for 20 seconds to obtain the sili...
Example Embodiment
[0054] Example 3:
[0055] 1) Forming of silicon carbide blank
[0056] A1. Selection of raw materials: silicon carbide powder I, silicon carbide powder II, low-density polyethylene, and dibutyl phthalate are selected for use at a mass ratio of 100:15:8:0.4;
[0057] B1. Mixing of raw materials: raw materials selected in proportion are mixed at a temperature of 120°C to form a uniform mixture;
[0058] C1. Molding of silicon carbide blanks: Put the mixture obtained in step B1 into an extruder to form a multi-channel tubular blank.
[0059] 2) Coating of silicon carbide film
[0060] A2. Preparation of silicon carbide film slurry: water, silicon carbide powder III, silicon carbide powder VI, and cellulose ether are mixed uniformly at a mass ratio of 100:40:5:0.4 to prepare silicon carbide film slurry;
[0061] B2. Coating of silicon carbide film layer: Inject the film layer slurry into the channel of the raw embryo prepared according to step 1), and flow for 25 seconds to obtain the silico...
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