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Cobalt brand

Cobalt brand

Cobalt is the 27th element of a side subgroup of the period IV, VIII groups of the periodic table where it is marked Co (lat. Cobaltum). Is a silvery-white metal. A thin layer of oxide may give it a yellowish, bluish or pinkish hue.

History

The name cobalt comes from the German Kobold, which means dwarf cave. When roasting the cobalt ores contain arsenic emit toxic volatile oxide AsO. Ancient Norwegians believed frequent poisoning in the smelting of silver mountain machinations of the evil spirit, so called the ore its name. In 1735, Georg Brandt a Swedish chemist, was able to allocate from the ore of the then unknown metal, and called people’s nickname. The chemist also found that the derivatives of this element gives a blue tint to the glass than was used in the days of ancient Babylon and Assyria.

Physical quality

Cobalt is a hard metal with two modifications: α-modification stable at t° to 427 °C, and the modification of β- (face-centered cubic lattice), when t° 427 °C — 1120 °C. Cobalt is ferromagnetic with a Curie point equal to 1121 °C.

Physical properties
Atomic (molar) mass, g/mol 58,93
Oxidation 3, 2, 0, -1
Density [g/cm3] 8,9
The melting temperature t°C 1494°C
The heat of fusion kJ/mol 15,48
The thermal conductivity K [W/(m·K)] 100
Heat of evaporation kJ/mol 389,1

Use

— catalysis of chemical reactions;

— an alloy which contains up to 50% with chromium and vanadium, used for permanent magnets;

— alloying With capable to improve the heat resistance of the alloy and improve the mechanical quality steel, making it the tool (drills, cutters etc);

— magnetic properties of alloys With enable their use in equipment for magnetic recording, and in the cores of transformers, electric motors;

— Co silicide is an excellent thermoelectric material for thermoelectric generators with high efficiency;

— radioactive 60 From used in medicine, gamma radiography, and also for fueling nuclear boilers;

— cobalt lithium is a highly effective positive electrode in the manufacture of lithium batteries.

Buy at best price

In stock LLC «AVEK global» — the widest range of rare and refractory metals at the best prices. Our specialists are ready to answer any questions and to help in the selection of necessary materials, upon request, will provide all the necessary information about the product, cost and delivery time. Rates depend on scope of delivery and additional conditions. For wholesale orders discounts. Buying products of the company «AVEK global», You will find a worthy partner.