2023-05-24

Graphite application

1. The oxidation and reduction method is used to synthesize graphene to prepare graphene modified electrodes to detect the four bases of DNA. Electrochemical research has found that graphene modifiers can achieve the four bases of DNA at the same time. The graphene and carbon nanotubes and β-cyclic paste are compounded. The carbon nanotuba effectively reduces the gathering of graphene. For high -sensitivity testing for berin nucleoside, the modified electrode can be promoted and applied to the determination of other biomolecules.2. The functionalization of biomolecular single-chain DNA (SSDNA) and graphene, and the prepared SSDNA-graphene composite materials can Stability. SSDNA-graphene composite material is larger than the surface area and has good biocompatibility. It is an excellent oxidation and restorease fixed material. Fix the SSDNA-graphene composite material to prepare glucose sensors for glucose oxidase. Glucose oxidase is realized directly electrochemical and maintains bio

2023-09-04

Carbon products for aluminum and carbon blocks and crucibles for metallurgical furnaces

Aluminum (magnesium) electrolysis uses pre baked anodes and anode paste, mainly produced from petroleum coke and asphalt coke, sometimes with a small amount of artificial graphite added. China is rich in bauxite. Since the 1980s, the electrolytic aluminum industry has developed rapidly, and for every ton of aluminum produced, approximately 450KG of pre baked anode is required. Therefore, carbon for aluminum has developed rapidly. But anode paste, like electrode paste, is considered a phased out product.The content of boron, vanadium, nickel, and sodium in the raw materials for pre baked anodes should be strictly limited.Carbon blocks used in various metallurgical furnaces (such as the side blocks of ironmaking blast furnaces, ferroalloy furnaces, calcium carbide furnaces, and aluminum electrolysis cells) are all used at high temperatures, so carbon blocks should have high mechanical strength, good thermal stability, and corrosion resistance, but the requirements for ash content are no

2023-02-08

my country's graphite issues

(1) Graphite mining planning and coordination are not in place

2023-02-20

It is critical to properly clean up graphite molds

Like other objects, graphite molds must be cleaned up after a long -term application. This is also a key factor in carrying out maintenance of graphite molds, and after cleaning up, the next manufacturing can be carried out immediately. As a result, the cleaning of graphite molds is very critical.If you want to achieve good practical effects and improve work effectiveness, proper operation steps are also crucial. During the entire process of cleaning the graphite mold, professional equipment maintenance management is created in the connection between the requirements and the actual operation. In order to complete the cost benefits, you must pay more attention when cleaning up. Especially for the different positions of graphite molds, the selected cleaning method is also likely to have a difference.Properly grasp the cleaning method of graphite molds and operate in accordance with the actual operation, which can increase the use period of the machine and equipment at a very large level

2023-04-12

How to distinguish whether Gwangba is clean and tidy?

1. Determine that the graphite boat has no acid and alkali ingredients. (After immersion, you can use pH to detect water or graphite boats that have been used as neutralized to determine the results of the cleaning.)2. Check out the surface layer, graphite guarding point and graphite boat, and whether there are residues of silicon nitride.3. Try the ceramic stick and porcelain sleeve with the dust -free paper -free paper -free paper -free paper.Remarks: The above rules are distinguished under the processing process of all normal washing boats. When the ceramic stick is broken during the whole process of laundering, the insistence is too large, and it needs to be immediately disassembled to prevent everything that endangers the graphite boat. Normal application.

2023-12-13

What are the reasons for the low initial efficiency of lithium carbide graphite negative electrodes

1. Low specific surface area: As you mentioned, the specific surface area of waste graphite is usually low, which leads to a decrease in the contact area between the electrolyte and graphite, affecting ion insertion and extraction during the initial charge and discharge process, thereby reducing the initial Coulombic efficiency. Compaction and coating treatment can increas

2023-04-21

What should be paid attention to when processing refractory materials with flake graphite?

The use of scales graphite and colloid graphite

Scales graphite is a very widely used non -metallic powder product, with good thermal conductivity, conductivity and lubrication effect; colloid graphite is a graphite product that uses natural scales graphite as the main raw material. There are certain differences in use. The following editor will introduce the purpose of scales graphite and colloid graphite:The scales graphite has a strong conductive capacity. It can replace the metal as a conductive material. The scale graphite can also be directly used as a carbon conductive filler or a composite conductive filler for conductive coating. The quality of scales graphite powder has a lot to do with its carbon content. Natural scales graphite collected from natural mines often contain a lot of impurities. It needs to be purified to get graphite powder with high carbon content because of high purity scales. The use of graphite is more widely used, providing an effective solution for the miniaturization and high integration of electroni

2023-11-22

Material characteristics of graphite powder

Graphite powder is a substance that is very sensitive to chemical reactions. In different environments, its resistivity will change, which means its resistance value will change. However, there is one thing that does not change. Graphite powder is one of the good non-metallic conductive substances. As long as the graphite powder is kept uninterrupted in an insulated object, it will also be electrified like a thin wire. However, there is no accurate number for the resistance value, Because the thickness of graphite powder varies, the resistance value of graphite powder will also vary when used in different materials and environments. Due to its special structure, graphite has the following special properties:1) High temperature resistant type: The melting point of graphite is 3850 ± 50 ℃, and the boiling point is 4250 ℃. Even after being ignited by an ultra-high temperature arc, the weight loss and thermal expansion coefficient are very small. The strength of graphite increases with te

2023-08-24

Electromagnetic properties of carbon and graphite

Artificial graphite is not necessarily a good conductor of electricity, but structurally belongs to the so-called polycrystalline graphite. Polycrystalline graphite is a carbon material with good graphitization performance obtained by heating at high temperatures. Carbon materials are generally obtained by treating organic matter in a reducing atmosphere, inert atmosphere, or vacuum. The carbon material obtained by heating below 1000 ℃ is not called carbonized material, but rather considered as an insulator. Only by heating the carbonized material above 1000 ℃ can the specific resistance rapidly decrease and become a good conductor of electricity. The polycrystalline graphite obtained by this method is still a carbon material in a sense, and artificial graphite requires temperature treatment above 2500 ℃ under atmospheric pressure. The change in electrical properties of carbon materials and carbides during simultaneous heating treatment is a very interesting and profound issue.A solid