Cobalt

A detailed Summary of Cobalt


Cobalt is a brittle, hard, transition metal with magnetic properties similar to those of iron. Cobalt is present in meteorites. Main Ore deposits in the world are found in Zaire, Morocco and Canada. Cobalt-60 (60Co) is an artificially produced isotope used as a source of g rays (high energy radiation). Cobalt salts colour glass a beautiful deep blue colour. Cobalt was discovered in 1735 by the Swedish chemist George Brandt. It has a relatively low strength and little ductility at normal temperatures, but is ductile at high temperatures. Cobalt melts at about 1495° C (about 2723° F), boils at about 2870° C (about 5198° F), and has a relative density of 89km/m cubed; the atomic weight of cobalt is 58.933. Cobalt is a Metal in the periodic table; it is number 27 on the list. It is not abundant and it's a transition metal. It is 30th in order by weight and is widel


Cobalt is found in low-grade ore; therefore small amounts of cobalt must be separated from large amounts of waste. Depending on the minerals in the ore different methods of extraction are used. To obtain cobalt you must first roast the cobaltite to change the cobalt to Cobalt Oxide (CoO) then the cobalt is freed from oxide by heating it with coke (carbon) to take away the oxygen, industrially, however, it is normally produced as a by-product from the production of copper, nickel, and lead.

Thermally resistant alloys, called superalloys, containing cobalt are used in industry

About 70% of the world's cobalt is used in alloys. Cobalt steels are not made in Australia. There are 2 main cobalt alloys the High Temperature and Magnetic alloys. High Temp. Alloys are made with about 5-10% cobalt and they go to make Gas turbines, jet propulsion engines and high-speed cutting t

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Category: Science

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