Manufacturing Method of Silicon Carbide Ceramic Seals by Liquid Phase Reaction Sintering

摘要

The present invention relates to a method of manufacturing a liquid reaction sintering (Liquid Phase Reaction Sintering) method and a silicon carbide (SiC) ceramic sealing material (Ceramics Seal) using a ceramic to be used in chemical pumps, magnetic pumps and blowers.; The present invention by 5 to 15 parts by weight of the carbon to silicon carbide of 95-85 by weight, a basic composition by adding an organic binder as a molding auxiliary are mixed the temperature was raised at a slow rate of 1~2 ℃ / min from room temperature to 800 ℃ thereof so as not to produce a defect in the molded body and heat-treated to remove the binder, and sintered for reaction time in the temperature range of 0.5~1 1,600~1,700 ℃ to produce a silicon carbide ceramic sealing material.; The present invention is dense with no porosity, and for the purpose of producing the silicon carbide sintered body having a ceramic sealing material C-ring strength of at least 400 MPa, hardness of 2,000 kg / mm ² or more.