BigPatents India

The invention relates to an improved process for sintering of silicon carbide. The process of the present invention can be used to produce sintered silicon carbide and silicon carbide based composite material consisting of additives of various shapes and size required for application as engineering as well as special refractory material. The process steps are: Silicon carbide powder is mixed with 5-25% additive by milling, milled powder is formed into shapes by different forming methods such as slip casting uniaxial pressing or isostatic pressing, the formed articles are dried in oven at 110+- 10oC, dried articles are placed in silicon carbide crucibles., silicon carbide crucibles containing formed articles are loaded in microwave heating system, microwave power generated is 0.8 to 5KW for 0.5 to 8 hours.