Siliconized graphite and preparation method of siliconized graphite

The invention discloses siliconized graphite and a preparation method of the siliconized graphite; the inner part of the siliconized graphite is an ihrigizing graphite layer, and the surface of the siliconized graphite is a siliconizing layer. The siliconized graphite disclosed by the invention has the characteristics of high density, even texture, good electric and thermal conductivity, good heat resistance, good acid-base resistance, high oxidation stability, and good and stable mechanical property. The thickness of the siliconizing layer is 0.5 to 10 mm, and the thickness is controllable; the bonding strength of the siliconizing layer and the ihrigizing graphite layer is high. According to the siliconized graphite and the preparation method disclosed by the invention, siliconizing temperature and siliconizing time can be optimized, the thickness of the siliconizing layer and the ratio of alpha-sic (silicon carbide) and beta-sic can be effectively controlled, and the heat stability of the siliconized graphite is improved.