What are the special properties and uses of Spherical Graphite?
The Spherical Graphite has its own special properties due to its special structure:
1, high temperature resistance: Spherical Graphite melting point of 3850 ± 50 ℃, boiling point of 4250 ℃, even by ultra-high temperature arc burning, the weight loss is very small, thermal expansion coefficient is also very small. The strength of Spherical Graphite is enhanced with the increase of temperature, and the strength of Spherical Graphite is doubled at 2000 ℃.
2, conductive, thermal conductivity: Spherical Graphite conductivity than ordinary non-metallic mine one hundred times higher. Thermal conductivity than steel, iron, lead and other metal materials. Thermal conductivity decreases with increasing temperature, even at very high temperatures, Spherical Graphite into a thermal insulation.
3, lubricity: Spherical Graphite lubrication performance depends on the size of Spherical Graphite scales, the larger the scale, the smaller the coefficient of friction, the better the lubrication performance.
4, chemical stability: Spherical Graphite at room temperature has good chemical stability, acid, alkali and resistant to organic solvent corrosion.
5, plasticity: Spherical Graphite toughness is good, can be a thin film.
6, thermal shock resistance: Spherical Graphite at room temperature when used to withstand the dramatic changes in temperature without damage, the temperature mutation, the Spherical Graphite volume change is not, will not produce cracks.
Spherical Graphite is a carbonaceous element crystalline mineral, its crystalline frame for the hexagonal layered structure, with conductivity, and diamond, carbon 60, carbon nanotubes are all carbon elements of the element, they are allotropes The
Spherical Graphite is widely used in industry for the production of high-temperature crucible on the smelting, mechanical industry lubricants, the production of electrodes and pencil lead; widely used in metallurgical industry, advanced refractory materials and coatings, military industrial pyrotechnics materials stabilizer, Light industry pencil lead, the electrical industry of carbon brush, the battery industry electrode, fertilizer industry catalyst.
The Spherical Graphite can be produced by deep processing of Spherical Graphite, Spherical Graphite sealing material and composite materials, Spherical Graphite products, Spherical Graphite mold, Spherical Graphite grinding additives and other high-tech products, as the various industrial sectors of the important non-metallic mineral raw materials The
Spherical Graphite electrolytic oxidation method, also known as anodic oxidation method, is a sulfuric acid or sulfuric acid and a small amount of additive mixture as an electrolyte, Spherical Graphite placed in the electrolyte, through the two electrodes power method of oxidation of the anode, The anodic oxidation and the potential of the Spherical Graphite in the electrochemical field can overcome the vanilla binding energy between the Spherical Graphite layers, allowing the intercalation ions to enter the interlayer and form interlayer compounds.
The working principle of Spherical Graphite electrolytic oxidation is mainly in the role of the external electric field, in the Spherical Graphite around the accumulation of a large number of ions in the Spherical Graphite layer inside and outside the formation of a large concentration difference, with the role of external force in the Spherical Graphite layer between the formation of oxidation reaction, Sulfuric acid, the method of the concentration of oxidants is not strict, can be low concentration of oxidant solution soak, resulting in less harmful gases, electrolytes and aqueous solutions can be recycled to reduce environmental pollution.