Manufacturing Of Sintered Silicon Nitride Body With High Thermal Conductivity

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Disclosed is a method for manufacturing a sintered body of silicon nitride with high thermal conductivity. The present invention provides a method for manufacturing a sintered body of silicon nitride comprising the following steps : preparing raw material powder, comprising oxide of at least two kinds of rare earth metal selected from the group consisting of silicon nitride, Y, Sc, Nd, and Yb, in accordance with a mixing formula represented by xSi_3N_4-yA_2O_3-zB_2O_3, wherein x, y, and z are mol%, and each of x, y, z are more than 0, and A and B are independently selected rare earth metal; mixing the mixed raw material powder; molding the mixed raw material powder; and sintering the molded body. According to the present invention, the sintered body of silicon nitride having high thermal conductivity and a grain boundary phase can be manufactured.COPYRIGHT KIPO 2017