Details: characteristics and uses of various graphite powder

”Graphite powder has soft texture and black gray color. Under the condition of isolation of oxygen, its melting point is above 3000 ℃. It is one of the minerals resistant to high temperature. Graphite powder is stable at room temperature, insoluble in water, dilute acid, dilute alkali; When oxygen is sufficient, it reacts with oxygen to generate carbon dioxide, and when oxygen is insufficient, it reacts with oxygen to generate carbon monoxide; Fluorine can react directly with carbon; At high temperature, many metal oxides can be reduced by its reducibility, and metals can be smelted, such as iron making.

Graphite, diamond, adamas and carbon 60 are all elemental elements of carbon, which are allotrope.

There are many types of graphite powder, the main types are as follows:

• 1. Flake graphite powder is a crystalline mineral of carbonaceous elements. Its shape is like fish scale, and the crystalline framework is hexagonal layered structure. The distance between each net layer is 340pm, and the distance between carbon atoms in the same net layer is 142pm. It belongs to hexagonal system with complete lamellar cleavage. It has good properties of high temperature resistance, conductivity, heat conduction, lubrication, plasticity and acid and alkali resistance

• 2. Nano graphite powder is the product of graphite powder particles through nano screen, and the particle size of nano graphite powder reaches nano level. Particle size index: D100 < 1000nm, D50 < 400nm, carbon content greater than 99.99%. Nano graphite powder is an ideal solid lubricating material. It forms chemically bonded tough and almost wearable nano graphite on the metal surface. A large amount of nano graphite is suspended in the lubricating oil to reduce resistance and friction and seal self-lubrication. It is widely used in chemical industry, steel lubrication, aerospace, lubricating oil and other fields.

• 3. Earthy graphite powder, also known as microcrystalline graphite, has excellent quality, high fixed carbon content, few harmful impurities, extremely low sulfur and iron content, stable chemical properties and is not affected by strong acid and alkali. It enjoys a high reputation in the graphite market at home and abroad, known as "gold sand".

• 4. In addition to the above types, graphite powder is also divided into high-purity graphite powder, cast graphite powder, colloidal graphite powder, etc.

Graphite powder is closely related to our life. Its main uses are as follows:

• 1. Refractory materials: graphite and its products have the properties of high temperature resistance and high strength. It is mainly used to manufacture graphite crucibles in the metallurgical industry. Graphite is commonly used as the protective agent of steel ingots and the lining of metallurgical furnaces in steelmaking.

• 2. Conductive materials: used in the electrical industry to manufacture electrodes, brushes, carbon rods, carbon tubes, graphite gaskets, telephone parts, television picture tube coating, etc.

• 3. Lubricating materials: graphite is often used as a lubricant in the machinery industry. Lubricating oil can not be used at high speed, high temperature and high pressure, while graphite lubricating material can work without lubricating oil at 2000 ℃.

• 4. High temperature metallurgical materials: graphite has reducibility. At high temperature, it can be used to reduce many metal oxides and smelt metals, such as iron making.

• 5. Polishing agent and anti-rust agent: graphite is also the polishing agent and anti-rust agent for glass and papermaking in light industry. It is an indispensable raw material for manufacturing pencil, ink, black paint, printing ink, artificial adamas and diamond，to read more graphite powder news contact us.