Recrystallized silicon carbide (RSiC) is made of high-purity and ultra-fine silicon carbide. Under the protection of 2400 ℃ high temperature and certain pressure atmosphere, silicon carbide will undergo evaporation condensation recrystallization. In this situation, the sintering body will be formed by intergrowth of particles at the contact of particles. It basically does not shrink. However, it has a certain number of pores.