Why is high-purity graphite one of the most temperature-resistant minerals?
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Author : Lzh
Update time : 2023-02-04 12:01:30
What is high-purity graphite powder? The chemical composition ofgraphite powderis mainly c, si. High-purity graphite powder has the advantages of high-temperature resistance, corrosion resistance, and lubricity. It is also an important carbon material, which is widely used in the metallurgical industry as a deoxidizer for steelmaking and manufacturing artificial diamond and refractory materials; In addition, it is also used as an additive for paint fillers and abrasives. In the mechanical industry, it is widely used to produce seals for automotive engine components.
Characteristics of High-Purity Graphite Powder Materials Graphite powder is a material with very sensitive chemical reactions. Its resistivity will change in different environments; its resistance value will change. (1) High-temperature resistant type: the melting point of graphite is 3850 ± 50 ℃, and the boiling point is 4250 ℃. Even if an ultra-high temperature arc burns it, the weight loss is very small, and the thermal expansion coefficient is also very small. The strength of graphite increases with the temperature. At 2000 ℃, the strength of graphite is doubled (2) Conductivity, thermal conductivity: The conductivity of graphite is 100 times higher than that of ordinary non-metallic ores. The thermal conductivity is higher than steel, iron, lead, and other metal materials. The thermal conductivity decreases with the increase in temperature; even at extremely high temperatures, graphite becomes an insulator (3) Lubricity: The lubricating performance of graphite depends on the size of the graphite flakes. The larger the flakes, the smaller the friction coefficient, and the better the lubricating performance.
Heat conduction of high-purity graphite powder When there is a temperature gradient in the graphite, the flow of heat from high temperature to low temperature/the parameter characterizing the thermal conductivity of graphite is thermal conductivity/thermal conductivity in unit time. The proportional coefficient between the heat passing through unit area q (heat flow density) and the temperature gradient gradT/q=– λ grad T (1) In the formula, the negative sign indicates that the direction of heat flow is opposite to the direction of temperature gradient/Formula (1) is often called the Fourier law of heat conduction. If the sectional area perpendicular to the x-axis is Δ S. The temperature gradient of the material along the x-axis is dT/dx Δτ Flow along the positive x-axis in time Δ The heat of section S is Δ Q (2) The legal unit of thermal conductivity is W · m · K. For an unstable heat transfer process, the temperature in the object varies with time. For an object that has no heat exchange with the outside world and has its temperature gradient, the temperature gradient will tend to zero as time goes on. That is, the temperature at the hot end will decrease, and the temperature at the cold end will increase, eventually reaching a consistent equilibrium temperature.
Price of high-purity graphite powder High-purity graphite powder particle size and purity will affect the product's price, and the purchase volume can also affect the cost of high-purity graphite powder. A large amount of large amount will be lower. The price of high-purity graphite powder can be found on our company's official website.
High-purity graphite powder supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including high-purity graphite powder, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective high-purity graphite powder, you are welcome tocontact usor inquire at any time.
