Cobalt Co, Group 9 (VIIIB) element. The atomic number is 27. Stable isotope 59. The density is 8.9 g/cm3. The temperature of 1495 ° C. The boiling point is 2870 ° C. The oxidation state is +2, +3. Gray metallic silver metallic luster. Ferromagnetic and ductility. Hardness, tensile strength and machinability are superior to iron. Does not interact with water and air at room temperature. Soluble in dilute hydrochloric acid, sulfuric acid and nitric acid. It is easily attacked by ammonia and sodium hydroxide. Heating reacts violently with oxygen, sulfur, chlorine and bromine . Important ore-minings are cobaltite, skutterudite and arsenic- cobalt. Cobalt ore is treated to separate cobalt hydroxide, and then metal cobalt is obtained by thermal reduction or electrolysis. Mainly used as an additive for special steel. Made of nickel and chromium, it is made of wear-resistant and heat-resistant alloy. Also used extensively for producing the magnetic alloy (e.g., samarium - drilling alloy). Arsenic-cobalt and arsenic-cobalt ore are the main cobalt deposits in nature. With aluminum reduction obtained after the luminance cobaltite arsenic or arsenic into the cobalt oxide burning. Cobalt-60 is usually made by bombarding metallic cobalt with neutrons. use: Widely used in jet aircraft, gas turbines and other devices operating at high temperatures. Other compounds can be used as catalysts, porcelain glazes, and the like. 60Co is a radioactive source that can be used to replace the X-ray and radium to inspect the structure inside the object and detect cracks and foreign matter inside the object. It can also be used to treat cancer and is used as a tracer in biology and industry. Auxiliary materials: The content of cobalt in the earth's crust is not small, more than the common metal lead , tin, etc., but significantly less than iron, and the melting point of cobalt and iron are comparable, so it is destined to find it later than iron. With regard to cobalt, ancient Greeks and Romans used their compounds to make colored glass, creating a beautiful dark blue. The blue color of China's Tang Dynasty colored porcelain is also due to the presence of cobalt compounds. These all indicate that the ancient working people have already used cobalt compounds. CoAs, a cobalt-containing blue ore cobalt deposit, was called kobalt in Europe in the Middle Ages and first appeared in the work of the German mineralogist Agricola in the 16th century. The word originally meant to be "demon" in German. This may be because the ore was considered useless at the time, and it was used because it contained arsenic and impeded the health of workers. Today, the Latin name of cobalt, the cobaltum and the elemental symbol Co, are exactly the word "monster" in German. In 1742, the Swedish chemistry professor Brent studied the cobaltite and discovered an unknown metal (also known as cobalt), which he listed as a semi-metal. In 1780 Bergman made pure cobalt. Cobalt was established as an element, and Lavoisier first included it in the element table in 1789. Tungsten Chips,Tungsten Carbide Chips,Tungsten Carbide Grits,Tungsten Carbide Fragments Luoyang Golden Egret Geotools Co., Ltd , https://www.xtcthermalspray.com
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Tungsten carbide grits are small particles or granules of tungsten carbide, a compound made up of tungsten and carbon atoms. They are extremely hard and have a high resistance to wear and abrasion, making them useful in a variety of industrial applications.
Tungsten carbide grits are often used as abrasives in cutting tools, grinding wheels, and sandpaper. They can also be used as an additive in metal alloys to improve their hardness and wear resistance. Additionally, tungsten carbide grits are used in the mining and drilling industry for rock drilling and excavation.
These grits are available in different sizes and shapes, such as spherical or irregular particles, depending on the specific application. They are typically produced through a process called sintering, where Tungsten Carbide Powder is heated and compressed to form a solid material.
Overall, tungsten carbide grits are highly valued for their hardness, durability, and resistance to wear, making them essential in various industries where high-performance materials are required.