碳石墨材料具有良好的耐腐蝕性,較高的導熱系數,低的摩擦系數,自潤滑性好,膨脹系數小,可制作各種形狀的密封環、石墨軸承、石墨磨擦片等產品，是機械密封較理想的摩擦副材料。Graphite has the good property of good resistant-corrosion , high thermal conductivity and lower friction ,good self-lubrication , the smaller expansion ,They can be made into the seal faces ,bearings and so on . It is ideal to choose it as the frictional mating rings.