2023-07-10

Expansion graphite, a new multifunctional insulation material

Expansion graphite is a kind of graphite that can expand and shrink in high temperature environments. This material has very special physical and chemical properties. Graphite is a kind of carbon, and its structure is connected by hexagonal carbon atoms. Generally, graphite can be completely melted, but at high temperature, due to the enhancement of the interaction between carbon atoms, graphite can form more stable stability The structure of the expansion is achieved.1. The development of expansion graphiteThe development of expansion graphite dates back to the 1960s. At that time, scientists discovered that graphite can be deformed regularly within a certain temperature range, and the translucent graphite can remain stable. Subsequently, scientists also found that under certain conditions, graphite at high temperature can be used to create a variety of structures, and these structures can be used to support greater weight and develop the technology of expanding graphite.Second, the

2023-04-21

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

The difference between graphite and coal

There are differences between graphite and coal in the following four aspects:Composition and structure: Graphite is composed of carbon elements, and its structure is composed of face centered cubic crystal structures. Carbon atoms are connected by strong covalent bonds. Coal, on the other hand, is mainly composed of alkyl groups and aromatic rings, with alkyl groups containing more hydrogen elements.Physical properties: Graphite has excellent conductivity, which is comparable to metals such as copper and silver. Coal, on the other hand, is a type of sedimentary rock containing carbon, which has the characteristics of providing thermal and chemical energy.Usage: Graphite is widely used in the manufacturing of pencil leads, electrodes, refrigerants, ships, anti-corrosion coatings, and lithium batteries due to its conductivity and other excellent properties. Coal, on the other hand, is mostly used as a biofuel and is widely used in fields such as power generation, barbecue, and water he

2023-02-22

What are the characteristics of graphite board?

The use of graphite board is so common, so what characteristics does it have?1. Easy process performance of graphite board: graphite board can be cut into different sizes, appearances, and thin thickness. It can give the membrane cutting plane board, which can be thinned from 0.05 to 1.5m.2. The heat resistance of graphite board: The temperature of the graphite board can reach 400 ° C, which can be less than -40 ° C.3. High -transmission thermality of graphite board: The thermal conduction rate in the plane map of the graphite board can achieve 1500W/mk, the heat transfer coefficient is 40%lower than the aluminum, 20%lower than the copper.4. The coordination ability of graphite board: The graphite board is very easy to make a multi -layer board with metal materials, cable shestages or double -sided tape to enhance the coordination ability of the design scheme and can have adhesives behind it.5. The lightness of graphite board: graphite board is 30%lighter than the same specifications,

2023-08-25

Chemical properties of graphite and carbon materials

Carbon materials are chemically inert in non oxidizing media. Under normal temperature and pressure, no chemical changes will occur. Except for long-term immersion in nitric acid, hydrofluoric acid, or in fluorine, bromine, and other strong oxidizing atmospheres, interlayer compounds will slowly form. It is not corroded by other acids, bases, and salts, and does not interact with any organic compounds. There is no significant oxidation phenomenon of graphite within 450 ℃ in the air. It only reacts with water vapor above 700 ℃ and with CO and CO2 above 900 ℃. The temperature at which graphite produces carbides with certain metal and oxide powders is mostly above 1000 ℃.The chemical reactions of carbon materials can be divided into the following three types:(1) Gasification reaction and high-temperature oxidation reaction;(2) Solid solid reactions with metals, ceramics, etc;(3) Formation reaction of interlayer compounds.

2023-12-18

Progress in graphitization process of carbon graphite products

The progress of graphitization process for carbon graphite products is mainly reflected in the following aspects:Process optimization: With the continuous research on the graphitization process of carbon graphite products, optimizing the process flow has become an important research direction. At present, many process flows have been optimized, for example, in the production process of carbon black, by optimizing the preparation process of carbon black particles, the selection of carbon black pigments, and the baking temperature of carbon black, the quality and yield of carbon black products can be improved.Carbon black structure control: During the graphitization process, the particle structure of carbon black has a significant impact on the performance of the product. Therefore, by controlling the structure of carbon black particles, the performance of the product can be improved and the competitiveness of the product can be enhanced. At present, researchers are exploring methods su

2023-08-01

Characteristics and Applications of High Purity Graphite

High purity graphite means that the carbon content of graphite is more than 99.99%. High purity graphite has the advantages of high strength, high density, high purity, good seismic resistance, high temperature resistance, oxidation resistance, small resistance coefficient, corrosion resistance, easy precision machining, etc. It is an ideal inorganic non-metallic material, which is used for processing and manufacturing electric heating elements, Electrical discharge machining graphite, sintering mold, electronic tube anode, etc, Widely used in advanced refractory materials and coatings in the metallurgical industry, stabilizers for military pyrotechnic materials, pencil leads in light industry, carbon brushes in electrical industry, electrodes in battery industry, and catalyst additives in fertilizer industry, high-purity graphite can be further processed to produce high-tech products such as graphite emulsion, graphite sealing materials and composites, graphite products, and graphite

2023-03-03

What are the key applications of graphite model

What are the critical use of graphite molds in recent years? Graphite has gradually become preferred materials for mold production with its excellent physics and organic chemical properties. Graphite molds are generally used in various industries. Below, let's take a look at the key use of graphite molds.1. Rare metal forging and semi -continuous forging for graphite moldsArtificial synthetic graphite is the best material as a continuous or semi -continuous forging mold for rare metals. Manufacturing practice has proved that because of the selection of graphite molds, its heat transfer performance is excellent (heat transfer performance. The condensation rate of metal materials or aluminum alloys is decided), and the self -lubricating bearing characteristics of the mold are good. Improve, and because of the accurate specifications of casting, clean surface, and well -proportioned crystalline mechanism, the production and processing of the next process process can be carried out. This

2023-07-07

The development and application of battery materials

1. Lithium -ion battery materialLithium ion batteries are currently widely used batteries. The positive electrode materials of lithium -ion batteries are usually lithium iron phosphate, lithium manganate, etc., while the negative electrode materials are graphite or silicon -based materials. In recent years, new silicon/graphite composite materials have gradually been applied.2. Calcium ion battery materialCalcium ion batteries have the advantages of low cost and high energy density, and have been studied in recent years. Among them, ingredients, calcium sulfide and other materials are considered to have potential electrode materials that have potential to become calcium ion batteries.3. Fuel cell materialThe fuel cell material refers to the electrodes, electrolytes, catalysts and other materials used to manufacture fuel cells. The important one is the catalyst. In recent years, precious metals have developed rapidly.4. ion ion battery material ion battery is a high -power, long -life

2023-07-24

The relationship between scales graphite and nuclear graphite

1. Different applications of scales graphite and nuclear graphite.Scales graphite has good high temperature resistance, heat conduction, conductivity, lubrication and other properties. It is an indispensable resource for the cultivation of the development of emerging industries and the transformation and upgrading of traditional industries. Graphite is mainly used as graphite materials in the nuclear industry, including the atomic reactor with neutron slow agents and reflexes, the production of hot column graphite for the production of isotopes, and the ball -shaped graphite and block graphite with high temperature and cold piles.2. Scales graphite and nuclear graphite are different branches of graphite materials.The scales graphite crystals are complete, thin -shaped, good toughness, stable physical and chemical performance, and have good temperature resistance, lubrication, conductivity, heat shock resistance, corrosion resistance, antioxidant, etc. Scales graphite is a very promisi