2023-05-17

Graphite products corrosion -resistant materials

Graphite has good chemical stability. After special processing graphite, it has the characteristics of corrosion resistance, good thermal conductivity, and low penetration rate. , Pump and other equipment. These devices are used in industrial departments such as petrochemical, wet metallurgy, acid -base production, synthetic fiber, and papermaking, which can save a lot of metal materials. 0 for casting, sandwiches, molding, and high temperature metallurgical materials, due to the small expansion coefficient of graphite, and can resist the changes in cold, cold and hot, can be used as the cast mold of glassware. After using graphite The rate is high, and it can be used without processing or processing, so a large amount of metal is saved. The production of hard alloy and other powder metallurgical processes is usually made of graphite materials to be used to durable souls. The crystal growth of single crystal silicon, regional refining containers, brackets, fixtures, inductive heater,

2023-07-31

The results of graphene composite materials in the field of aluminum alloy corrosion protection

Graphene is a flat film composed of carbon atoms. It has only one carbon atom and is almost completely transparent. The graphene composite material has the characteristics of high strength, good toughness, excellent conducting thermal and thermal performance. Environmental purification and other fields have broad application prospects.Due to its large reserves, high strength, and good processability, aluminum alloy has been widely used in modern industries, military aerospace and civilian fields. loss. Therefore, it is important to do the anti -corrosion work of aluminum alloy materials.In this project, the composite of gallery oxide participating in self -made water -soluble nano -coating materials and rare earth passivation has a significant promotion effect on aluminum alloy anticorrosion. Among them, graphene alleviates environmental pollution caused by organic emissions, improves the coatings itself. Anti -environmental aging ability, rare earth replace toxic hexavalent chromium,

2023-02-06

Graphite physics

Graphite is soft, black and gray, with greasy feeling, which can pollute paper. The hardness is 1-2, and the hardness can be increased to 3 to 5 along the vertical direction.

2024-04-17

The Legend of Graphite

Graphite, this black mineral, carries the legend of thousands of years. Since ancient times, graphite has been a symbol of people's wisdom. Whether in writing or painting, graphite has written a chapter of history with its unique charm. Its texture is delicate, and its color is profound. Each piece of graphite seems like a masterpiece of nature, quietly telling the story of the vicissitudes of time.In the wave of technology, graphite has demonstrated its extraordinary value. As an important industrial raw material, it plays a crucial role in fields such as metallurgy and chemical industry. Meanwhile, graphite is also a darling in the field of new energy, and its excellent conductivity and stability make it shine in fields such as batteries and electrodes. Graphite, with its toughness and durability, witnesses the progress of human civilization.However, the charm of graphite goes far beyond that. Under the influence of culture, graphite has become a carrier of art. Sculptors use graphi

2023-10-25

Carbon and graphite products

（1） Graphite electrodes are mainly made from petroleum coke and needle coke as raw materials, and coal tar pitch as a binder. They are made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. They are conductors that release electrical energy in the form of an arc in an electric arc furnace to heat and melt the furnace material. According to their quality indicators, they can be divided into ordinary power, high power, and ultra-high power. Graphite electrodes include:(1) Ordinary power graphite electrode. Allowing the use of graphite electrodes with a current density below 17A/cm2, mainly used for ordinary power electric furnaces such as steelmaking, silicon smelting, and yellow phosphorus smelting.(2) Anti oxidation coated graphite electrode. A graphite electrode coated with an antioxidant protective layer on the surface forms a protective layer that is both conductive and resistant to high-temperature oxidation, reducing electrode consumption duri

2023-05-10

The application of scales graphite in LED lights

Scales graphite is used in various industries, and scales can also be applied to LED lights. The following editors will explain the application of scales in LED lights in detail in detail.The poor heat dissipation of LED lamps will cause problems such as power damage, acceleration of light decay, and shortening life. It is always top priority to improve the performance of the LED lighting system. It is difficult for metal materials to be treated in LED heat dissipation applications. Multi -problems such as conductivity, easy deformation, and difficulty recycling waste.This problem will not occur in graphite materials. The scales have good plastic plasticity, easy to process, and have excellent high temperature resistance and thermal conductivity. They can be processed into graphite heat sinks. The heat will be absorbed by graphite heat sink Graphite can also be combined with plastic to make cooling lamps, heat dissipation and heat sink cups and heat dissipation shells.The heat dissipa

2023-08-21

High power and ultra high power electrodes

The characteristic of high-power and ultra-high-power electrodes is low resistivity, allowing for a current load of 25% -40% higher than that of ordinary electrodes; The allowable current density is greater than twice; Low coefficient of thermal expansion; High flexural strength; Low oxidation loss. The production of high-power and ultra-high-power electrodes uses needle coke as the raw material, and multiple impregnations are used in the production process to increase the graphitization temperature, and corresponding improvements are made to the bonding and impregnating agents.The requirements for ultra-high power graphite electrodes are relatively strict. The volume density of the electrode reaches 1.72g/cm3; The resistivity drops to 5-7 Ω. mX10-6. Due to the fact that the current density allowed by ultra-high power is more than twice that of ordinary electrodes, the thermal stress and impact it bears increase. Therefore, the electrode requires a low coefficient of thermal expansion

2023-02-08

Graphite flotation method

Floating is a commonly used and important mineral method. Graphite has good natural floating. Basically, all graphite can be purified by floating methods. In order to protect graphite scales, most of the graphite flotation uses multiple sections of processes. Graphite flotation collecting agents are generally used for kerosene, with a dosage of 100 to 200g/t. The foaming agent is generally used with pine or butad ether, and the amount is 50 to 250g/t.

The characteristics of high performance of silica graphite

SiO2, C, and SIC's reaction freedom can see Table 1.The freedom of reaction between SIO2, C and SICThe reaction of carbon and silicon is shown in Figure 2 with changes in temperature.The reaction of carbon and silicon changes with the temperatureThe thermal treatment temperature of graphite matrix materials (reflects its graphite), thermal expansion coefficient, pore rate and pore diameter size and distribution have a great impact on the seepage process. In order to obtain a good performance of siliconized graphite, the thermal expansion coefficient of graphite matrix materials should be as close to SIC as much as possible. It is best to use the same -sex graphite. The open air pores should be 12%to 15%. The above methods can be carried out according to the needs. For example, first use the CVR method, and then use the CVD method to process it, so that the obtained siliconized graphite is not breathable and free of free silicon. Silicon goblin has the characteristics of carbon and sil

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