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Six classifications of graphite and their applications
The graphite reserves in my country are vast and well distributed. However, many are small- and medium sized minerals. Private small graphite miners have operated in my country, but their added value is low. After many years of hardwork, my country has invested in a large amount of money and scientific and technological personnel. The graphite reserves of my country have been used more efficiently after a reorganization and improvement in the graphite use. Now, my country has developed high purity graphite as well as expanded graphite.
1. High purity graphite
High-purity Graphite (carbon contents > 99.99%) can be used to stabilize military industrial pyrotechnics materials, advanced refractory material in the metallurgical sector, Chemical fertilizer catalysts, additives etc.
2. Isostatic Graphite
The graphite used to make isostatic graphite comes from high-purity material. It has a low coefficient of thermal expansion, good heat resistance and chemical resistance. In the past fifty years, isostatic graphite has become a world-first product. It has not only achieved great success in civil applications, but it is also a leading material in national defence. This is a brand new material, which is also eye-catching. Basically used for the following aspects.
(1) Heater to heat polysilicon ingots
As a result of the global warming, the awareness among humans to protect the Earth has increased. More and more people now prefer natural energy that does not emit carbon dioxide. In this trend, solar cell technology has become the “darling of the new age”. The ingot heater that is used during the manufacturing process must be made out of graphite.
Nuclear fission (high temperature gas-cooled) reactor
In order to meet the requirements of graphite as a moderator for high-temperature nuclear reactors that use gas cooling, it must be resistant to deformation and radiation stress. Therefore, a modular high temperature gas cooled reactor has been proposed. Modern ultra-high temperature reactors are characterized by high power density at high temperature. This raises the bar for new graphite materials. They must be of good quality, low cost, have a high radiation damage tolerance and homogenize the product.
Nuclear fusion reactor.
Graphite’s special properties also play an important role in nuclear fusion. It can greatly reduce the metal particles in the material’s plasma, and therefore plays an important role in improving energy confinement. As nuclear fusion devices expand, graphite wall materials that have high mechanical and thermal strength are the best choice for the first material to face the plasma. These materials also show a good discharge pulse during application. Because graphite is low in atomic numbers and has low radiation losses, it can be mixed with plasma to keep it stable.
(4) Electric discharge machining electrode.
In the electrodes for electric discharge machining, graphite electrodes offer many advantages. Although graphite is a good material, it has some drawbacks. For example, dust and wear can occur during cutting.
3. Expandable graphite
Also known as acidified or flake graphite. It is made from high-quality graphite and an interlayer compound that has been treated by acidic oxidizers. Expanded Graphite offers many advantages, such as high-temperature resistance, high-pressure resistance, good seal performance, and corrosion resistance for various media. It is a type of advanced seal material. It is used mainly in the following areas.
(1) Environmental protection as a field.
Expanded graphite has a lipophilicity that makes it hydrophobic and can remove non-aqueous water solutions. This property is commonly used to remove oil from the sea surface. A large amount of oil can be absorbed by this product due to its molecular composition. After oil, the graphite can be aggregated in blocks and float on water. It can also be recycled or reused. Expanded graphite, in addition to its selective adsorption, has an inhibitory impact on air pollution. This includes the adsorption and removal of carbon dioxide.
Sealing Material
Expanded graphite is processed into flexible graphite, which has no brittleness at low temperatures and does not crack.
4. Graphite fluoride
Graphite fluoride, a high-tech material with high-performance and high-efficiency, is one of the most active research areas in the world. It is widely used for functional materials due to its unique properties and excellent performance.
(1) It is used as a releaser.
Graphite-fluoride is characterized by its low surface energy. It is mainly used in metal molds for powder molding and die casting as well as plywood molding.
(2) Solid lubricants
It is also suitable for harsh conditions like high temperature, pressure, corrosive media, and heavy loads. For example, high temperature Lubricants are used for aircraft engines, car bearings, and other high-temperature applications.
(3) Raw materials for batteries
It is difficult to use fluorine in the active material of batteries made from fluorine and lithium because fluorine gas can be poisonous. Fluorinated Graphite is used for its excellent electrochemical properties when mixed with organic electrolytes. This makes it a popular material in the integrated circuit memory of cameras, computers and watches.
5. Colloidal graphite
One of the main features of colloidal graphite is its lubricity. The colloidal film of graphite has an excellent thermal insulation in the vertical direction. It is used widely in turbine propellers and hot steam cylinders. It is used to reduce static electricity in the electronics industry.
6. Graphene
Graphene consists of a hexagonal honeycomb-like lattice made up of hybrid sp2 orbitals and carbon atoms. This is a two-dimensional, one-atom thick material. It is the most durable and hard nanomaterial ever found.
The special arrangement of its atomic structure has made it widely used.
(1) According to ultra-thin Graphene (single layer graphene almost transparent; its molecules are tightly packed, so that even the smallest of helium atoms can’t pass through), the strength is super strong, and it can be used in ultra-light armors, ultra thin and ultra light aircrafts, etc. .
(2) Its conductive atoms have a much higher speed than electrons that move in metal conductors. It can be made into graphene conductor agent.
Its thermal conductivity is superior to all known substances. Due to the rapid movement and movement of its conductive atoms, it can be applied in place of silicon as a component of future curved mobiles, photon sensors, and supercomputers.
(4) Other applications. Researchers have found that bacteria cells cannot grow on the graphene but human cells do not suffer any damage. Use graphene in bandages, food packaging and more.
Tech Co., Ltd. is a professional manufacturer of graphite with more than 12 years’ experience in research and development for chemical products. You can contact us to send an inquiry if you need high-quality graphite.
The graphite reserves in my country are vast and well distributed. However, many are small- and medium sized minerals. Private small graphite miners have operated in my country, but their added value is low. After many years of hardwork, my country has invested in a large amount of money and scientific and technological personnel. The graphite reserves of my country have been used more efficiently after a reorganization and improvement in the graphite use. Now, my country has developed high purity graphite as well as expanded graphite.
1. High purity graphite
High-purity Graphite (carbon contents > 99.99%) can be used to stabilize military industrial pyrotechnics materials, advanced refractory material in the metallurgical sector, Chemical fertilizer catalysts, additives etc.
2. Isostatic Graphite
The graphite used to make isostatic graphite comes from high-purity material. It has a low coefficient of thermal expansion, good heat resistance and chemical resistance. In the past fifty years, isostatic graphite has become a world-first product. It has not only achieved great success in civil applications, but it is also a leading material in national defence. This is a brand new material, which is also eye-catching. Basically used for the following aspects.
(1) Heater to heat polysilicon ingots
As a result of the global warming, the awareness among humans to protect the Earth has increased. More and more people now prefer natural energy that does not emit carbon dioxide. In this trend, solar cell technology has become the “darling of the new age”. The ingot heater that is used during the manufacturing process must be made out of graphite.
Nuclear fission (high temperature gas-cooled) reactor
In order to meet the requirements of graphite as a moderator for high-temperature nuclear reactors that use gas cooling, it must be resistant to deformation and radiation stress. Therefore, a modular high temperature gas cooled reactor has been proposed. Modern ultra-high temperature reactors are characterized by high power density at high temperature. This raises the bar for new graphite materials. They must be of good quality, low cost, have a high radiation damage tolerance and homogenize the product.
Nuclear fusion reactor.
Graphite’s special properties also play an important role in nuclear fusion. It can greatly reduce the metal particles in the material’s plasma, and therefore plays an important role in improving energy confinement. As nuclear fusion devices expand, graphite wall materials that have high mechanical and thermal strength are the best choice for the first material to face the plasma. These materials also show a good discharge pulse during application. Because graphite is low in atomic numbers and has low radiation losses, it can be mixed with plasma to keep it stable.
(4) Electric discharge machining electrode.
In the electrodes for electric discharge machining, graphite electrodes offer many advantages. Although graphite is a good material, it has some drawbacks. For example, dust and wear can occur during cutting.
3. Expandable graphite
Also known as acidified or flake graphite. It is made from high-quality graphite and an interlayer compound that has been treated by acidic oxidizers. Expanded Graphite offers many advantages, such as high-temperature resistance, high-pressure resistance, good seal performance, and corrosion resistance for various media. It is a type of advanced seal material. It is used mainly in the following areas.
(1) Environmental protection as a field.
Expanded graphite has a lipophilicity that makes it hydrophobic and can remove non-aqueous water solutions. This property is commonly used to remove oil from the sea surface. A large amount of oil can be absorbed by this product due to its molecular composition. After oil, the graphite can be aggregated in blocks and float on water. It can also be recycled or reused. Expanded graphite, in addition to its selective adsorption, has an inhibitory impact on air pollution. This includes the adsorption and removal of carbon dioxide.
Sealing Material
Expanded graphite is processed into flexible graphite, which has no brittleness at low temperatures and does not crack.
4. Graphite fluoride
Graphite fluoride, a high-tech material with high-performance and high-efficiency, is one of the most active research areas in the world. It is widely used for functional materials due to its unique properties and excellent performance.
(1) It is used as a releaser.
Graphite-fluoride is characterized by its low surface energy. It is mainly used in metal molds for powder molding and die casting as well as plywood molding.
(2) Solid lubricants
It is also suitable for harsh conditions like high temperature, pressure, corrosive media, and heavy loads. For example, high temperature Lubricants are used for aircraft engines, car bearings, and other high-temperature applications.
(3) Raw materials for batteries
It is difficult to use fluorine in the active material of batteries made from fluorine and lithium because fluorine gas can be poisonous. Fluorinated Graphite is used for its excellent electrochemical properties when mixed with organic electrolytes. This makes it a popular material in the integrated circuit memory of cameras, computers and watches.
5. Colloidal graphite
One of the main features of colloidal graphite is its lubricity. The colloidal film of graphite has an excellent thermal insulation in the vertical direction. It is used widely in turbine propellers and hot steam cylinders. It is used to reduce static electricity in the electronics industry.
6. Graphene
Graphene consists of a hexagonal honeycomb-like lattice made up of hybrid sp2 orbitals and carbon atoms. This is a two-dimensional, one-atom thick material. It is the most durable and hard nanomaterial ever found.
The special arrangement of its atomic structure has made it widely used.
(1) According to ultra-thin Graphene (single layer graphene almost transparent; its molecules are tightly packed, so that even the smallest of helium atoms can’t pass through), the strength is super strong, and it can be used in ultra-light armors, ultra thin and ultra light aircrafts, etc. .
(2) Its conductive atoms have a much higher speed than electrons that move in metal conductors. It can be made into graphene conductor agent.
Its thermal conductivity is superior to all known substances. Due to the rapid movement and movement of its conductive atoms, it can be applied in place of silicon as a component of future curved mobiles, photon sensors, and supercomputers.
(4) Other applications. Researchers have found that bacteria cells cannot grow on the graphene but human cells do not suffer any damage. Use graphene in bandages, food packaging and more.
Tech Co., Ltd. is a professional manufacturer of graphite with more than 12 years’ experience in research and development for chemical products. You can contact us to send an inquiry if you need high-quality graphite.