Two-dimensional phonon gas model of high-purity graphite powder
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Author : Lzh
Update time : 2023-02-04 12:22:49
What is high-purity graphite powder? The chemical composition ofhigh-purity graphite powder is mainly c, si, and other elements and contains a small number of s, p, fe, mn, and other impurities. High-purity graphite powder has the advantages of high-temperature resistance (3000 ° C), corrosion resistance (insoluble in acid), and lubricity. Graphite powder is one of the important raw materials for the production of pencil lead; It is also the raw material for making refractory materials and coatings; 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.
Development Prospect of High-Purity Graphite Powder It is estimated that the capacity of graphite powder will continue to grow in the next ten years as long as the whole market is sufficiently supported and mining and expansion are successful. The new graphite capacity will make up for the current capacity of 100000 tons of flake graphite lost due to mining due to engineering mistakes. According to insider analysis, global graphite product research and development will be carried out in ten major fields. At the same time, the former National Building Materials Bureau, as the world's largest graphite producer, China's output accounts for 40%~50% of the world's total output. India, the world's second producer, has accounted for about 15% of its graphite output in the past decade. Other producers are Brazil (7%), Mexico (6%), and North Korea (6%). The total output of graphite in the five countries above accounts for more than 75% of the world's total output. If the world graphite market environment continues to develop in a favorable direction, graphite output will increase, especially in Brazil, Canada, China, India, and Mexico. The total amount is expected to increase by 120000 tons.
Thermal Conductivity Theory of High-Purity Graphite Powder The movement of phonons is classified. Each category is called a phonon branch, and each branch is given a code. There are several phonon branches on the regular hexagonal plane of the Brillouin zone, mainly including three longitudinal branches, with a maximum frequency of 37THz and velocity of vL=2.36 × 10cm/s; 2. TA, transverse branch, the maximum frequency of 25THz, the velocity of vT=1.59X10cm/s; 3. The low TA branch, also known as the bending vibration branch, has a maximum frequency of 14THz and a velocity of vb=0.53 × 10cm/s. In addition, there are folding LA branches, transverse optical branches, etc. The frequency of these nonmain branches is lower than 4THz, and they interact strongly with other branches, so they are less than 4THz; that is, the angular frequency is less than wc=2.5 × These branches of 10S play no role in heat transfer and can be ignored. Who is called the lower limit of phonon angular frequency? The speed of the low TA branch is much lower than LA and TA, which can also be ignored. In this greatly simplified case, only the LA and TA branches are considered, and only the thermal conductivity is considered without involving the heat capacity. This is the so-called two-dimensional phonon gas model.
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 us or inquire any time.
