| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for preparing an α-SiC-carbon-boron compound powder-aluminum compound powder slurry used for casting, having a slurry concentration of >=76 wt.%, and capable of forming cast products each having a thickness of >=10 mm and giving sintered products having good densities and flexural strengths. SOLUTION: This method for producing a silicon carbide slurry for casting comprises mixing α-SiC powder having a specific surface area of 7-22 m<2> /g with an organic carbon source and/or inorganic carbon powder, boron compound powder, aluminum compound powder, 0.05-0.16 g/(100g α=SiC) of an organic dispersant of styrene-maleic acid copolymer or oligomer, 0.30-0.60 g/(100 g α-SiC) of an amine-based pH adjusting agent, an organic binder, a plasticizer, a defoaming agent and pure water and/or a solvent. The obtained silicon carbide slurry has a pH of 10.0-12.0, a slurry powder concentration of >=76 wt.% and a powder solid volume rate of >50 vol.%. |
