Method for preparing recrystallized silicon carbide product through plastic method
A technology of recrystallizing silicon carbide and silicon carbide, which is applied in the field of silicon carbide materials, can solve the problems of long cycle time, low production efficiency and high cost of grouting process, and achieve the effects of reducing water content, shortening drying time, and improving density and strength
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Embodiment 1
[0019] Example 1 : present embodiment provides a kind of method for preparing recrystallized silicon carbide products by plastic method, and its raw material is 68 parts of silicon carbide coarse powders, 32 parts of silicon carbide fine powders, 1.5 parts of plasticizers and 1.5 parts of lubricants by mass parts Composition, the specific process steps are:
[0020] (1) Shaping the silicon carbide coarse powder by ball milling for 6 hours to remove the sharp corners and corners of the particles. After passing through a 200-mesh sieve, take the sieve as the shaping silicon carbide coarse powder; use the silicon carbide fine powder with a concentration of 5% Polyethylenediamine solution was coated to obtain modified silicon carbide fine powder;
[0021] (2) Mix the modified silicon carbide fine powder and plasticizer evenly, then add shaped silicon carbide coarse powder, after mixing evenly, slowly add water and lubricant, and knead in a kneader to form a water content of 8% P...
Embodiment 2
[0026] Example 2 : present embodiment provides a kind of method for preparing recrystallized silicon carbide products by plastic method, and its raw material is 65 parts of silicon carbide coarse powders, 35 parts of silicon carbide fine powders, 2 parts of plasticizers and 2 parts of lubricants by mass parts Composition, the specific process steps are:
[0027] (1) Mill the silicon carbide coarse powder for 5 hours for shaping treatment, remove the sharp corners and corners of the particles, pass through a 150-mesh sieve and take the sieve as the shaped silicon carbide coarse powder; use the silicon carbide fine powder with a concentration of 10% Coating treatment with polyethylenediamine solution to obtain modified silicon carbide fine powder;
[0028] (2) Mix the modified silicon carbide fine powder and plasticizer evenly, then add shaped silicon carbide coarse powder, after mixing evenly, slowly add water and lubricant, and knead in a kneader to form a water content of 1...
Embodiment 3
[0032] Example 3 : present embodiment provides a kind of method for preparing recrystallized silicon carbide products by plastic method, and its raw material is 62 parts of silicon carbide coarse powders, 38 parts of silicon carbide fine powders, 2.5 parts of plasticizers and 1 part of lubricant by mass parts Composition, the specific process steps are:
[0033] (1) Shaping the silicon carbide coarse powder by ball milling for 4 hours to remove the sharp corners and corners of the particles. After passing through a 250-mesh sieve, take the sieve as the shaping silicon carbide coarse powder; use a concentration of 15% silicon carbide fine powder Polyethylenediamine solution was coated to obtain modified silicon carbide fine powder;
[0034] (2) Mix the modified silicon carbide fine powder and plasticizer evenly, then add shaped silicon carbide coarse powder, after mixing evenly, slowly add water and lubricant, and knead in a kneader to form a water content of 12%. Plastic si...
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