What is graphite powder?

Graphite powder has good chemical stability, after special processing of graphite powder, with corrosion resistance, good thermal conductivity, is one of the minerals of high temperature resistance, under heating, graphite powder is easier to be oxidized by acid; At high temperatures, it can also react with many metals to generate metal carbides, and metals can be smelted at high temperatures, which can save a lot of metal materials.

Special properties of graphite powder

(1) High temperature resistance type of graphite powder: the melting point of graphite powder is 3850±50 °C, the boiling point is 4250 °C, even if it is burned by ultra-high temperature arc, the weight loss is very small, and the thermal expansion coefficient is also very small. The strength of graphite strengthens with increasing temperature, doubling at 2000 °C.

(2) Electrical and thermal conductivity: The electrical conductivity of graphite powder is one hundred times higher than that of general non-metallic minerals. The thermal conductivity exceeds that of metal materials such as steel, iron, and lead. The thermal conductivity decreases with increasing temperature, and even at extremely high temperatures, graphite becomes an insulator.

(3) Graphite powder lubricity: The lubricating performance of graphite depends on the size of graphite scales, the larger the scale, the smaller the friction coefficient, and the better the lubrication performance.

(4) Chemical stability: graphite powder has good chemical stability at room temperature, and can resist acid, alkali and organic solvent corrosion.

(5) Plasticity: graphite powder has good toughness and can be formed into very thin flakes for years.

(6) Thermal shock resistance of graphite powder: graphite powder can withstand the drastic change of temperature without damage when used at room temperature, and when the temperature suddenly changes, the volume of graphite does not change much and will not produce cracks.

Advantages of graphite powder

According to the functions of graphite powder suitable for majority of industries, we can conclude the following excellent properties.

(1) Low surface wettability: graphite will not be wet by most molten metals.

(2) High temperature resistance: graphite will not melt and sublimate at 3900K. It is stable in 750K air.

(3) High temperature impact resistance: graphite is particularly resistant to thermal shock. Therefore, there is no problem with heating and cooling for a short time.

(4) Specific heat: The difference in specific heat of different graphite grades is very small.

(5) High thermal conductivity: The thermal conductivity of graphite exceeds that of many metals, which decreases with the increase of temperature and varies due to the degree of graphitization.

(6) Good mechanical strength: Compared with other materials, before graphite reaches 2700 °C, its tensile strength, compressive strength and flexural strength increase with the increase of temperature.

(7) Density: 1.6-1.9g/cm3 is equivalent to 1/4 of iron or 1/5 of copper. Can be used for large electrodes.

(8) Fast electro-etching processing speed: 1.5-3 times that of copper, rough beating is more advantageous.

(9) Small electrode consumption: according to different electrical conditions, it is 1/3-1/5 of copper.

(10) Fast machining speed: graphite has good machinability and can be made into complex shapes and high-precision parts. The cutting resistance is 1/4 of copper, and the processing energy is twice that of copper.

Application of graphite powder

Graphite powder is suitable for many industries and has its unique magic, as following:

(1) Used as a release lubricant in the production of catalysts in the fertilizer industry.

(2) High temperature resistant lubricant binder, corrosion-resistant lubricant binder.

(3) Powder metallurgy release agent and metal alloy raw materials.

(4) It is used to make carbon film resistance, conductive dry mold and prepare conductive liquid.

(5) For casting, sanding, pressing and high-temperature metallurgical materials: due to the small thermal expansion coefficient of graphite powder, and can withstand changes in rapid cold and heat, it can be used as a casting mold for glassware, and the ferrous metal obtained accurate size after using graphite powder, high surface smooth yield, can be used without processing or slight processing, thus saving a lot of metal.

(6) Make fillers or performance improvers for rubber plastics and various composite materials to improve the wear resistance, compression resistance or conductivity of materials.

In the process of continuous development of Franli factory, with the needs of the economy, our graphite powder gradually develops to the industrial field, environmental protection field, electronics field, chemical field, etc., the graphite powder of Franli factory can be the most affordable price and the best quality, more convenient for the production of different products in various fields.