properties of cobalt

It may also enter air and water and settle on land through wind-blown dust and enter surface water through run-off when rainwater runs through soil and rock containing cobalt. It is unique in that, added in moderate amounts to iron, it raises that metal’s saturation magnetization (the limit to which its magnetic properties can be raised). It has a high melting point and is hard-wearing even at high temperatures. Although the average level of cobalt in soils is 8 ppm, there are soils with as little as 0.1 ppm and others with as much as 70 ppm. Humans add cobalt by releasing small amounts into the atmosphere from coal combustion and mining, processing of cobalt-containing ores and the production and use of cobalt chemicals. Atomic number (number of protons in the nucleus): 27 2. Cobalt is a chemical element with the symbol Co and atomic number 27. However, too high concentrations of cobalt may damage human health. It is a hard ferromagnetic, silver-white, lustrous, brittle element. At standard temperature and pressure, cobalt is not readily oxidized, which means it does not easily lose electrons from its surface. Cobalt has been classified to be carcinogenic to experimental animals by the Federal Republic of Germany. Density: 8.86 grams per cubic centimeter 5. Cobalt is beneficial for humans because it is a part of vitamin B12, which is essential for human health. Cobalt Commercial Services, LLC is a full service commercial real estate brokerage company servicing the properties owned and/or managed by affiliates of Cobalt Property Group, LLC. Your email address will not be published. Like other metals, it can also be magnetized. Copper can be used to draw away negative energy. 2.2. On the other hand, soils near mining and melting facilities may contain very high amounts of cobalt, so that the uptake by animals through eating plants can cause health effects. It is similar in appearance to iron and nickel. Cobalt (hydro)oxide films on Bekipor ST 20AL3 sintered metal fiber were formed by electrochemical deposition under galvanostatic conditions using different electrolyte baths (nitrate, acetate and chloride). It is also used as catalysts for the petroleum and chemical industries. Exposure to cobalt may cause weight loss, dermatitis, and respiratory hypersensitivity. Tin is an amazing substance that is a reminder that metals are made of crystals and that they are only experienced by us as "metallic" and "hard" because the circumstance… The radioactive isotopes, cobalt-60, is used in medical treatment and also to irradiate food, in order to preserve the food and protect the consumer. As a group, the cobalt-base alloys may be generally described as wear resistant, corrosion resistant, and heat resistant (strong even at high temperatures). Cobalt is a Block D, Period 4 element, while oxygen is a Block P, Period 2 element. Distributieweg 3 2645 EG Delfgauw The Netherlands Phone: +31 152 610 900 fax: +31 152 616 289 e-mail: info@lenntech.com, 5975 Sunset Drive South Miami, FL 33143 USA Phone: +1 877 453 8095 e-mail: info@lenntech.com, Level 5 - OFFICE #8-One JLT Tower Jumeirah Lake Towers Dubai - U.A.E. Melting point: 2,723 degrees Fahrenheit (1,495 degrees Celsius) 7. Cobalt can be found in cobaltite, erythrite, glaucodot and skutterudite ores. Notes on the properties of Cobalt: Specific Heat: Value given for solid phase. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Cobalt is a hard ferromagnetic, silver-white, hard, lustrous, brittle element. When animals graze on these grounds they suffer from lack of cobalt, which is essential for them. It is used in magnets and magnetic recording media. Influence of stabilizing agents on structural and optical properties of cobalt oxide nanoparticles synthesized by an ultrasound-assisted method. In the last years, CoFe 2 O 4 (cobalt ferrite) nanoparticles become remarkable material due to their performance in various sophisticated applications. In particular, cobalt's very high melting point and mechanical strength at high temperatures has seen its extensive use in what is termed 'superalloys'. In general, there are two classes of magnetic substances, hard magnets and soft magnets. Properties of Cobalt-60 Cobalt-60 is naturally unstable, therefore emits two gamma rays at energies of 1.17 MeV and 1.33 MeV, and decays at a rate of approximately 1% per month back to stable, non-radioactive nickel-60. However, if the metal is heated in air, a cobalt-oxide material forms quite easily. Physical Properties. Many of the properties of the alloys arise from the crystallographic nature of cobalt (in particular its response to stress), the solid-solution-strengthening effects of chromium, tungsten, and molybdenum, the formation of metal carbides, and the corrosion resistance imparted by chromium. It is found in mineral ores. Cobalt is used in many alloys & super alloys to make parts in aircraft engines, gas turbine, high-speed steels, corrosion resistant alloys, cemented carbides. Cobalt - Properties - Price - Applications - Production. Cathodes made with cobalt won't overheat easily or catch fire, which is a major safety issue, and they'll also be able to store and transfer more energy. Furthermore, the metal possess high melting and boiling points. Cobalt is an element that occurs naturally in the environment in air, water, soil, rocks, plants and animals. It is one of the three naturally occurring magnetic metals ( iron and nickel being the other two) and retains its magnetism at a higher temperature (2012°F, 1100°C) than any other metal. Cobalt is of relatively low abundance in the Earth's crust and in natural waters, from which it is precipitated as the highly insoluble cobalt sulfine CoS. Carcinogenicity- International Agency for Research on Cancer (IARC) haslisted cobalt and cobalt compounds within group 2B (agents which are possibly carcinogenic to humans). Atomic symbol (on the Periodic Table of Elements): Co 3. The main ores of cobalt are cobaltite, erythrite, glaucodot, and skutterudite. This radiation is sometimes used with cancer-patients to destroy tumors. Pure cobalt is obtained through smelting process, which is hard and lustrous and release vapors of arsenic. Used as drying agents for paints and inks. The metal melts at 1495 °C and boils at 2927 °C. Health effects that are a result of the uptake of high concentrations of cobalt are: - Vomiting and nausea - Vision problems - Heart problems - Thyroid damage Health effects may also be caused by radiation of radioactive cobalt isotopes. Cobalt is a hard, brittle metal. The total daily intake of cobalt is variable and may be as much as 1 mg, but almost all will pass through the body unadsorbed, except that in vitamine B12. 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The metal is used especially for heat-resistant and magnetic alloys. Because of this fruits, vegetables, fish and other animals we eat will usually not contain very high amounts of cobalt. Abstract. Cobalt is usually not mined alone, and tends to be produced as a by-product of nickel and copper mining activities. Boiling point: 5,301 F (2,927 C) 8. This article discusses the properties and applications of cobalt oxide nanoparticles. Cobalt is generally produced as a by-product of nickel and copper mining. It is a member of group VIII of the periodic table. Cobalt. Cobalt is a is transition metal. Cobalt is a brittle, hard metal, resembling iron and nickel in appearance. The element is active chemically, forming many compounds. Cobalt will only mobilize under acidic conditions, but ultimately most cobalt will end up in soils and sediments. Cobalt is not often freely available in the environment, but when cobalt particles are not bound to soil or sediment particles the uptake by plants and animals is higher and accumulation in plants and animals may occur. This can cause sterility, hair loss, vomiting, bleeding, diarrhoea, coma and even death. When plants grow on contaminated soils they will accumulate very small particles of cobalt, especially in the parts of the plant we eat, such as fruits and seeds. Its properties and price determine its applications. Phone: +971 4 429 5853 e-mail: info@lenntech.com, Copyright © 1998-2020 Lenntech B.V. All rights reserved, Plant Inspection & Process Optimalisation, Separation and Concentration Purification Request. It has a metallic permeability of about two thirds that of iron. Your email address will not be published. (LD50 = Lethal dose 50 = Single dose of a substance that causes the death of 50% of an animal population from exposure to the substance by any route other than inhalation. In the marine environment cobalt is needed by blue-green algae (cyanobacteria) and other nitrogen fixing organisms. Cobalt produces many vibrant colours, is wear resistant, oxidation resistant, ferromagnetic and conducts electricity. Cobalt, metallic chemical element, one of the transition elements, atomic number 27. Cobalt alloys have good magnetic properties, corrosion resistance, wear resistance, and high temperature strength. ACGIH has placed cobalt and inorganic compounds in category A3 (Experimental animal carcinogen- the agent is carcinogenic in experimental animals at a relatively high dose, by route(s), histologic type(s), or by mechanism(s) that are not considered relevant to worker exposure.) Cobalt is a ferromagnetic (strongest magnet), up to 11210C. Atomic weight (average mass of the atom): 58.933195 4. Cobalt is used to treat anaemia with pregnant women, because it stimulates the production of red blood cells. The transformation is sluggish and accounts in part for the wide variation in reported data on physical properties of cobalt. Cobalt is a hard ferromagnetic, silver-white, hard, lustrous, brittle element. Like iron, it can be magnetized. It is similar to iron and. Up to date, curated data provided by Mathematica's ElementData function from Wolfram Research, Inc. Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here! Like iron, it can be magnetized. Because of its impressive properties cobalt is an important component in wear resistant and corrosive resistant alloys. Cobalt has two innate properties that make it ideal for battery applications: thermal stability and high energy density. It is stable in air and does not react with water. - 0.28 V ( Co2+/ Co ) ; +1.84 V ( Co3+/ Co2+ ). 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