Graphite powder soft, dark gray; greasy feeling, can contaminate the paper. Hardness of 1 to 2, along the vertical direction with the increase in the hardness of the hardness can be increased to 3 to 5. Specific gravity of 1.9 to 2.3. In the isolated oxygen conditions, the melting point of more than 3000 ℃, is one of the most resistant minerals. At room temperature, the chemical properties of graphite powder is relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents; materials with high temperature conductive properties, do refractory materials, conductive materials, wear-resistant lubricating materials.
Graphite powder is widely used, according to its different use, we can be divided into the following categories of graphite powder
1. Scale graphite powder
Flake Graphite powder is the most widely used, but also processed into other graphite powder of the original material, scaly graphite powder specifications from 32 to -12000 mesh range, scaly graphite powder toughness is good, with good thermal conductivity and corrosion resistance, can be used as refractory Materials, wear-resistant lubricating materials, conductive materials, casting, Fansha, die and high temperature metallurgical materials
2. colloidal graphite powder
Colloidal graphite is formed by the average dispersion of graphite particles below 2u meters in an organic solvent. Colloidal graphite is a viscous suspension of black filaments. Colloidal graphite powder with high quality natural flake graphite performance, in high temperature conditions with special oxidation resistance, self-lubricating and plasticity, at the same time with good conductivity, thermal conductivity and adhesion, mainly used in sealing, metallurgical stripping and other industries
3. Ultrafine graphite powder
Ultrafine graphite powder specifications are generally between 8000 mesh -10000 mesh, mainly used in powder metallurgy release agent, the production of graphite crucible, the battery anode and make conductive materials additives
4, nano-graphite powder
Nano-graphite powder main specifications for the D30 50 100 400 nm, nano-graphite powder process is more complex, low production rate, so relatively high prices, mainly used in anti-corrosion coatings, lubricants additives, grease additives, precision graphite seal And other industries, in addition, nano-graphite powder in scientific research institutions also has a high application value
5, High Purity Graphite powder
Graphite Powder,Nano-Graphite Powder,Graphite Carbon,Carbon Brush For Graphite Powder Fengcheng Ruixing Carbon Products Co., Ltd , https://www.lnfcrxts.com
According to reports, Baoji City will externally assess the testing equipment and testing capabilities of the agricultural, quality supervision, health, industry and commerce, drug administration and other regulatory agencies, and propose plans for the purchase of food safety inspection facilities in the city, authoritative inspection projects and key inspection directions. .
On the basis of avoiding duplicate investment, Baoji City invests 10 million yuan to supplement the equipment and equipment it lacks, and strives to build the province's leading, first-class food inspection and detection system in the northwest, which is specially used for food sampling. The relevant departments will improve the supervision and inspection system, strengthen irregular sampling inspections and random sampling inspections, especially for key varieties such as rice, noodles, oil, meat, eggs, poultry, and milk, such as fresh milk acquisition, live animal trafficking, and slaughtering. Small workshops, small catering, and other weak parts, intensify inspection and sampling, expand the range of sampling, and increase the frequency and efficiency of sampling.
As the saying goes, the disease comes from the mouth. How to ensure the quality and safety of food, people feel at ease? Recently, the reporter learned from the Baoji City Food Safety Committee office that Baoji City decided to come up with 10 million yuan to build the province's leading, Northwest first-class food inspection and inspection system, from the source of good food quality.