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

2023-04-19

What is the use of spherical graphite?

Ballog graphite is widely used in the market and is widely used in industry, agriculture, and industrial and mining. The wide application field is an important additive in industrial production. So where is spherical graphite applied.1. Ballog graphite as refractory material: Graphite structure and its related product companies have a high temperature resistance and high -strength properties. In the metallurgical machinery industry, it can be mainly used to make graphite crickets in the manufacturing process.2. Ballog graphite as conductive materials: used to manufacture electrodes, carbon pipes, mercury rectifiers, telephone parts, TV visual pipes, etc.3. Ballog graphite is used as abrasive lubrication material: Graphite is often lubricant in the mechanical industry. Lubricants are usually not used at high speeds, high temperature and high pressure conditions, and wear -resistant materials can be graphite at high slippery speed.4. The spherical graphite structure has a good chemical

2023-11-14

Several physical and chemical indicators that need to be understood when selecting graphite materials

Graphite is an allotrope of elemental carbon, where each carbon atom is surrounded by three other carbon atoms (arranged in a honeycomb like pattern with multiple hexagons) that are covalently bonded to form covalent molecules. Due to its excellent properties, graphite is used to make many materials. Below are several physical and chemical indicators that need to be understood when selecting graphite materials:1. Average particle diameter of the materialThe average particle diameter of a material directly affects its discharge condition. The smaller the average particle size of the material, the more uniform the discharge of the material, the more stable the discharge condition, and the better the surface quality. For forging and die-casting molds with low surface and precision requirements, it is usually recommended to use materials with coarser particles; For electronic molds with high surface and precision requirements, it is recommended to use an average particle size of 4 μ Mater

2023-05-15

How to solve the corrosion of the device in the scale graphite?

How to avoid the corrosion of the equipment on the equipment, thereby reducing equipment investment and maintenance costs, and improving production efficiency and profits is a problem that each chemical enterprise always needs to solve. Many products are resistant to corrosion but not high temperature, but scales graphite has both advantages. The following editors will introduce the problem of the device corrosion in detail how to solve the equipment of the scales:1. Excellent thermal conductivity. Scales graphite also has good thermal conductivity. It is the only non -metallic material with a thermal conductivity higher than the metal. The thermal conductivity coefficient is 2 times that of carbon steel and 7 times that of stainless steel. Therefore, it is suitable for heat transfer equipment.2. Excellent corrosion resistance. Various types of carbon and graphite have excellent corrosion resistance to all concentrations of hydrochloric acid, phosphate, and hydrofluoric acid, includin

2023-02-22

The application temperature category of graphite board

So, how much is the application temperature category of graphite board?The application temperature category of graphite board: -200-650 ℃ (in the air), -200-3000 ° C (in non-air oxidation substances).The structure of high -temperature graphite board is atomic crystals, and the middle price is connected in the middle of the oxygen atom, resulting in a porous material that stabilizes the positive hexagon. Because the covalent single -key is a ion key with a high key that can be very high, it must be highly mechanical energy to be damaged.The average graphite board is 1200 degrees. There is no problem in the following use, such as: precision processing parts processing, spark -loading wire cutting, industry creation, etc. The high -quality graphite board with high -quality characteristics can withstand high temperatures above 3000 degrees. Because the graphite board uses high -quality graphite carbon raw materials, it reasonably reduce the pore rate and increase the volume density, which

2023-03-28

The main characteristics of artificial graphite

Crystal structure

Compared with ordinary graphite powder, ultrafine graphite powder

Compared with ordinary graphite powder, ultrafine graphite powder materials have the characteristics of low melting point, high chemical activity, strong magnetism, good thermal conductivity, and abnormal absorption of electromagnetic waves due to the "volume effect" and "surface effect". In recent years, ultrafine graphite powder has become a cutting-edge research field in interdisciplinary fields such as polymer chemistry, physical chemistry, inorganic chemistry, and materials science.The smaller the particle size of ultrafine graphite powder, the more significant the physical and chemical properties change, and ultrafine graphite powder does not require additives. This opens up broader avenues for the application of high-performance inorganic structural materials. The smaller the diameter of ultrafine graphite powder particles, the larger their total specific surface area, and the corresponding increase in surface energy, resulting in higher chemical activity. This can be used as a

2023-07-05

The development and application of battery materials

Computers, cars, airplanes, and space capsules all need battery as power, and the core of the battery is battery material. According to its chemical composition and structure, it can be roughly divided into the following categories:The main ingredients are alloys of lead and lead, copper, zinc, tin, etc. Lead -acid batteries are a mature, stable energy storage equipment, which are widely used in automotive, UPS and other fields.Cobalt, nickel, manganese, iron and other elements. Lithium -ion batteries have become one of the popular batteries due to their high energy density, long life, and no pollution. Widely used in mobile power, electric vehicles, drones, smart homes and other fields.Nickel, cobalt and other elements. Because of its high capacity, long life and other characteristics, nickel -metal hydride batteries have become one of the main batteries in satellite, ships, electric tools and other fields.The main ingredients are oxygen in aluminum and air. Aluminum -air batteries h

2023-11-06

Advantages and disadvantages of high carbon graphite purification methods

The flotation method is one of the conventional mineral purification methods that consumes less energy and reagents, and has a lower cost. This is a major advantage of the flotation method for purifying graphite. However, using flotation to purify graphite can only achieve a limited increase in its grade. For flake graphite, using multi-stage grinding not only cannot completely dissociate its monomer, but also is not conducive to protecting the large scale of graphite. Therefore, using flotation to further improve graphite grade is neither economical nor scientific. To obtain high carbon graphite with a carbon content of over 99%, chemical methods must be used to purify the graphite.（1） Chlorination roasting method. The low roasting temperature and low chlorine consumption of the chlorination roasting method significantly reduce the production cost of graphite. At the same time, the carbon content of graphite products is equivalent to that after treatment with hydrofluoric acid, and t

2023-05-17

Graphite Product Materials advantage

Graphite products (including graphite rods, graphite products, graphite blocks, graphite boards, graphite carbon pipes, graphite rings) are important strategic resources. Graphite is a degeneration of carbon substances, which is most common in Dali, sliced rocks, or hemp rocks. The coal seam can form graphite through the thermal deterioration, while a small amount of graphite is a native mineral of fire rock.The industrial graphite ore is divided into two categories: crystal (scale) graphite ore and steady crystal (earth -shaped) graphite ore. Crystal graphite ore can be divided into two types: scale -like and dense. Chinese graphite ore is the type of scales -like crystal, followed by hidden crystal type, and dense crystal graphite is only seen in individual mining plants such as Tocobra, Xinjiang.Due to its special structure, graphite products are resistant to high temperature resistance, heat shock resistance, conductivity, lubrication, chemical stability, and plasticity. Important