Graphite powderIt is a substance with very sensitive chemical reactions. In different environments, its resistivity will change, that is, its resistance value will change, but one point will not change. Graphite powder is one of the good non-metallic conductive materials. As long as the graphite powder is kept uninterrupted in an insulated object, it will also be energized like a thin wire. However, there is no accurate number for the resistance value, because the thickness of graphite powder is different, The resistance value of graphite powder used in different materials and environments will also be different. Graphite has the following special properties due to its special structure:

(1) High temperature resistant type: the melting point of graphite is 3850 ± 50 ℃, and the boiling point is 4250 ℃. Even if it is burned by ultra-high temperature arc, the weight loss is very small, and the coefficient of thermal expansion is also very small. The strength of graphite increases with the increase of temperature. At 2000 ℃, the strength of graphite is doubled.
(2) Lubricity: the lubricity of graphite powder depends on the size of graphite scales. The larger the scales, the smaller the friction coefficient, and the better the lubricity.

(3) Plasticity: graphite has good toughness and can be connected into very thin flakes.
(4) Thermal shock resistance: when graphite is used at normal temperature, it can withstand drastic changes in temperature without damage. When the temperature changes abruptly, the volume of graphite changes little and cracks will not occur.
(5) Conductivity and thermal conductivity: the conductivity of graphite is 100 times higher than that of general non-metallic minerals. Its thermal conductivity exceeds that of metal materials such as steel, iron and lead. The thermal conductivity decreases with the increase of temperature, and even at extremely high temperatures, graphite becomes an insulator.
(6) Chemical stability:Graphite powderIt has good chemical stability at normal temperature and is resistant to acid, alkali and organic solvents

Graphite powder is a kind of black gray, metallic and opaque fine scale solid, with soft powder and delicate feeling. It has good conductivity. The hardness is 1-2, and the hardness can increase to 3-5 with the increase of impurities in the vertical direction. The specific gravity is 1.9 ~ 2.3. Under the condition of oxygen isolation, its melting point is above 3000 ℃, and it is one of the most temperature resistant minerals. At normal temperatureGraphite powderIts chemical properties are relatively stable, and it is insoluble in water, dilute acid, dilute alkali and organic solvents; The material has high temperature resistance and electrical conductivity It is generally used as refractory material, conductive material and wear-resistant lubricating material& nbsp;