Microstructure Control Method of Silicon Nitride Sintered Body by Controlling Particle Size of Raw Material Powder

摘要

In the present invention, the Si ₃ N ₄ initial raw material powder having a particle size of 0.5 μm or less is obtained through the particle separation method, and the initial raw material powder and the sintering aid are mixed for the purpose of expanding the high-tension silicon nitride and limited application field. After the compression molding, the microstructure of the silicon nitride sintered compact in which the microstructure of the sintered compact obtained by atmospheric sintering the obtained green compact at the temperature of 1850 degrees C or less has a double structure is provided.