Graphite used in a wide range of industries, will be used in almost every industry. On the industrial use of the artificial graphite, which is special GRAPHITE. According to their shape the way there are several types.
1, isostatic graphite. That is, a lot of people called the three graphite high, but not the three-HIP is high.
2, molded graphite
3, extruded graphite electrode material for more.
According to which the graphite sub-granularity, it can be classified: details of the graphite structure (in surface area than the general 10-20m2 / g, F-Sorb 2400 Miriam BET surface area method of testing), in the thick of graphite (particle size in general 0.8mm Or so), as well as graphite electrodes
(2-4mm).
Graphite because of its special structure, and with the special nature of the following:
1)-type high temperature: the melting point of graphite for the 3850 ± 50 ℃, for the boiling point of 4250 ℃, even if by the ultra-high-temperature electric arc burning, weight loss is very small, very small coefficient of thermal expansion. With the temperature increase the intensity of graphite and strengthened in 2000 ℃, double the strength of graphite.
2) conductivity, thermal conductivity: The conductivity of the graphite than the average non-metallic mineral-high 100 times. Thermal conductivity than steel, iron, lead metal materials. With the thermal conductivity and lower the temperature, even at very high temperatures, the body of graphite into the insulation. Graphite can be conductive because each of the carbon atoms in graphite and other carbon atoms to form only 3 covalent bond, each of the carbon atoms to retain a free electronic transmission to the charge.
3) lubrication: the lubricating properties of graphite flake graphite depends on the size, the greater the scale, the smaller the coefficient of friction, lubrication, the better the performance.
4) chemical stability: graphite at room temperature with good chemical stability, to acid, alkali and corrosion-resistant organic solvents.
5) plasticity: toughness of graphite, can be crushed thin sheets.
6) thermal shock resistance: the use of graphite at room temperature can withstand severe temperature changes will not be damaged when the temperature mutation, small changes in the size of the graphite would not have a crack.
1, isostatic graphite. That is, a lot of people called the three graphite high, but not the three-HIP is high.
2, molded graphite
3, extruded graphite electrode material for more.
According to which the graphite sub-granularity, it can be classified: details of the graphite structure (in surface area than the general 10-20m2 / g, F-Sorb 2400 Miriam BET surface area method of testing), in the thick of graphite (particle size in general 0.8mm Or so), as well as graphite electrodes
(2-4mm).
Graphite because of its special structure, and with the special nature of the following:
1)-type high temperature: the melting point of graphite for the 3850 ± 50 ℃, for the boiling point of 4250 ℃, even if by the ultra-high-temperature electric arc burning, weight loss is very small, very small coefficient of thermal expansion. With the temperature increase the intensity of graphite and strengthened in 2000 ℃, double the strength of graphite.
2) conductivity, thermal conductivity: The conductivity of the graphite than the average non-metallic mineral-high 100 times. Thermal conductivity than steel, iron, lead metal materials. With the thermal conductivity and lower the temperature, even at very high temperatures, the body of graphite into the insulation. Graphite can be conductive because each of the carbon atoms in graphite and other carbon atoms to form only 3 covalent bond, each of the carbon atoms to retain a free electronic transmission to the charge.
3) lubrication: the lubricating properties of graphite flake graphite depends on the size, the greater the scale, the smaller the coefficient of friction, lubrication, the better the performance.
4) chemical stability: graphite at room temperature with good chemical stability, to acid, alkali and corrosion-resistant organic solvents.
5) plasticity: toughness of graphite, can be crushed thin sheets.
6) thermal shock resistance: the use of graphite at room temperature can withstand severe temperature changes will not be damaged when the temperature mutation, small changes in the size of the graphite would not have a crack.
