2023-04-14

Application of graphite

1. Sealing materials: Mix the raw material high -carbon graphite with concentrated sulfuric acid and concentrated nitric acid for acidification, and then suppress the molding after heat treatment. The prepared flexible graphite is a new type of high -performance sealing material. Compared with traditional sealing materials such as asbestos rubber, it has good performance of compression, reflection, elasticity, self -adhesion, low density, etc., and can be used for a long time under high temperature and high corruption. The graphite board and sealing elements made are widely used in industries such as Aerospace, Machinery, Electronics, Nuclear Energy, Petrochemical, Power, Ship, Small, and other industries. The excellent characteristics of lubrication, plasticity and chemical stability are known as the "king of sealing" in the world.2. The field of environmental protection: The expansion graphite obtained by high temperature puffing has a rich hole structure, so it has excellent adsorp

2023-05-10

Factors affecting scales graphite oxidation

Scale graphite has strong heat resistance and good corrosion resistance. It is the main carbon raw material used by carbon -resistant refractory materials, but it will have an oxidation reaction with oxygen at high temperature at high temperature. The following editor introduces the factors that affect the oxidation of scales. The specifics are as follows:1. Carbon oxidation responseHeating graphite in the air, carbon can be directly oxidized by O2 to CO and CO2. When carbon oxidation, CO and CO2 hybrid gases are generated. At low temperatures, it is mainly to balance CO2 and solid graphite. Solid graphite balance. At more than 1000 ° C, almost all of the mixed gas is CO. The oxidation response speed of graphite decreases with the total pressure of the system, but it increases with the rise of temperature.2. The effect of granularity on oxidation temperatureWith the increase of granularity, the temperature of the graphite's significant oxidation starts and the temperature of the oxida

2023-12-11

The Future Market Prospects of Graphite Powder

Mechanical performance of expansion graphite at different temperatures

Expansion graphite has excellent chemical stability, heat resistance, sealing, self -lubricating, radiation resistance and high heat -conducting. It is widely used in industrial fields such as machinery, oil, chemical, metallurgy, aerospace, navigation, transportation, and transportation. It is an ideal advanced sealing material. The mechanical property of expanded graphite may be different at different temperatures.1. Within the temperature range of 400 degrees Celsius, the compressed elastic modulus, rebound rate, and compression rate of expansion graphite sealing materials are not significantly affected by the temperature, and the impact is not greatly affected.2. There are significant differences in the compression modulus, rebound rate, and compression rate of two samples made of different materials formulas and processes, and there are also appropriate differences in the compression strength.3. Within the temperature range from room temperature to 400 degrees, the pressure resis

2023-11-01

Basic Research on Graphene

Graphene is a type of ² A new material in which hybrid connected carbon atoms are tightly packed into a single-layer two-dimensional honeycomb lattice structure. Graphene has excellent optical, electrical, and mechanical properties, and has important application prospects in materials science, micro/nano processing, energy, biomedical, and drug delivery. It is considered a revolutionary material in the future. Andre Geim and Konstantin Novoselov, physicists from the University of Manchester, UK, successfully separated graphene from graphite by micromechanical stripping method, so they jointly won the 2010 Nobel Prize in Physics. The common methods for producing graphene powder are mechanical stripping, redox, SiC epitaxial growth, and the film production method is chemical vapor deposition (CVD).Graphene has special significance for fundamental research in physics, as it enables some quantum effects that could only be theoretically demonstrated to be experimentally verified. In two-di

2023-05-09

Lubrication of scales graphite

Scale graphite has many functions. Today, the editor focuses on the lubrication effect of scales graphite. As a lubricant, scales graphite is mainly distributed in water, oil or other media to form stable colloidal substances. It can be directly applied to parts that need to be lubricated. Combined with lubricant.The use of scales graphite as a lubricant has the following effects: After using scales graphite powder lubricants in various mechanical operating components, it can reduce friction, fever, burns, etc., and extend the service life of the machine; reduce the loss of friction power and improve work efficiency; Save lubricating oil consumption, many of which can be reduced to about 60%; improve the surface quality of processing parts, and extend the service life of processing parts and appliances; reduce mechanical failures and noise during the operation, and save maintenance costs; add boilers, add boilers, add boilers, add boilers, add boilers, add boilers, add boilers, add bo

2023-08-14

What are the processing methods for different types of carbon materials

(1) Processing of graphite electrodes. The processing of electrodes can be divided into three processes: boring and rough flat end faces, turning outer circles and fine flat end faces, and milling threads.(2) Processing of conical joints. The processing of conical joints can be divided into six processes: cutting, flat end face, turning conical surface, milling thread, drilling and installing bolts, and slotting.(3) Processing of cylindrical joints. The cylindrical joint can be divided into three processes: cutting, flat end face, and thread milling.(4) Processing of carbon blocks. The processing of carbon blocks mainly involves flat six surfaces.(5) Processing of special-shaped carbon materials. According to user needs, perform cutting, turning, grinding, boring, slotting, and planing. For products with special requirements, more precise processing is required after normal processing.

2023-07-07

How to use expansion graphite

1. Protective useExpansion graphite can be used as protective materials, which can be used to protect metal and other damaged objects, such as circuit boards and steel. Because expansion graphite can expand 10 times, it can effectively block the flames and make these objects from burning with flames.2. InsulationExpansion graphite can also be used as insulation materials, because it has good thermal resistance and can effectively block heat, so it can be used for insulation, such as electronic products. It can also be used for cooling, preventing the loss of heat, thereby playing the role of heat preservation.3. Filtering useExpansion graphite can also be used as filtering materials, because it has adsorption and can be used to adsorb toxic substances, such as pollutants used in water treatment, which can effectively remove pollutants in water. It can also be used for air purification to block the entry of harmful substances.4. Reinforcement useExpansion graphite can also be used as r

2023-08-17

The position and role of carbon industry in the development of the national economy

Compared with large industries such as machinery, automobiles, electronics and electrical engineering, mining and metallurgy, railways, and transportation, the carbon industry is a small industry, but it occupies an important position and plays an important role in the development of the national economy in China. According to China's first five-year plan, 156 large-scale projects were newly built, of which the carbon industry accounted for two projects. For example, the development of the steel industry cannot be separated from carbon materials and products, especially electric furnaces for smelting alloy steel, which must have graphitized electrodes. Electrolytic aluminum production requires the consumption of 400-450kg of carbon anodes for each ton produced. In addition to ordinary civilian industries, carbon fiber composite materials have a wide range of applications in aviation, aerospace, nuclear energy, military and other fields, such as high specific strength, light weight, an

2023-11-16

Classification of Graphene

There are two classification methods for graphene. One is based on the number of layers, which can be divided into four categories: single-layer, double-layer, few layer, and multi-layer products; Another type of product can be divided into three categories according to its form: powder, slurry, and film. Graphene powder and graphene thin film are currently the two main forms of graphene materials. The former is mostly doped in other materials and is widely used in coatings and lithium-ion batteries; Graphene thin films are widely used in the fields of electronics, photons, and optoelectronic devices due to their advantages of transparency, conductivity, and flexibility. Different graphene products have certain differences in raw materials due to different preparation methods. Graphene powder is mainly formed by physical or chemical methods, and the main raw material is natural graphite. Graphene thin films are mainly deposited by chemical vapor deposition, and their raw materials are