Taking zirconium powder,silicon powder,boron carbide and phenolic resin as raw materials and absolute ethyl alcohol as dispersant,Zr B2-Zr C-Si C composite ceramic powder is prepared through in situ reaction at different temperatures from 900 ℃ to 1 700℃ and analyzed. The best thermal treatment temperature and the corresponding best environment of thermal treatment are determined.Researches show that the best thermal treatment temperature is 1 600 ℃ and the best environment of thermal treatment is Ar atmosp...