密封材料在工业上用途很广,是一种常用的消耗材料。一般用作容器、管道、阀门、汽缸等结合面和填料箱的密封填料,也用作转动机械各密封部位的动密封件。近年来,柔性石墨材料在我国电力、炼油、化工等工业上得到了广泛应用。实际应用证明,它对降低设备泄漏率、减少消耗、延长设备检修周期及改善劳动条件等均有较大作用。天然石墨是由弱的范得瓦尔力相互结合的碳六角网状组织层结构体,外观呈颗粒、鳞片状,有良好的隔热性、耐腐蚀、耐高温和耐辐射性能。膨胀粒子是天然石墨粒子通过化学处理经高温膨胀成型的。在石墨和强氧化剂进行反应时,石墨层间形成一种新的生成物——石墨氧化物,它使石墨朝一个方向微小膨胀。从层与层之间距离测量可知,层间 Sealing materials in a wide range of industrial applications, is a commonly used consumable material. Generally used for containers, pipes, valves, cylinders and other packing surface packing and packing seal, also used as sealing parts of the rotating mechanical seal. In recent years, flexible graphite materials in China’s power, oil refining, chemical industry has been widely used. Practical application shows that it has a greater role in reducing equipment leakage rate, reducing consumption, extending equipment maintenance cycle and improving working conditions. Natural graphite is a carbon hexagonal reticular layer structure combined by weak Van de Waals forces. It has the appearance of particles and scales, good heat insulation, corrosion resistance, high temperature resistance and radiation resistance. Expanded particles are natural graphite particles by chemical treatment by high temperature expansion molding. As graphite and strong oxidant react, a new product, graphite oxide, forms between the graphite layers, which causes the graphite to expand slightly in one direction. From the distance measurement between layers we can see, between layers