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16th century cupellation furnaces (per Agricola). Cupellation is a refining process in metallurgy in which ores or alloyed metals are treated under very high temperatures and subjected to controlled operations to separate noble metals, like gold and silver, from base metals, like lead, copper, zinc, arsenic, antimony, or bismuth, present in the ore.
Crucibles used in Czochralski method Melting gold in a graphite crucible Three crucibles used by Thomas Edison. Crucibles are used in the laboratory to contain chemical compounds when they are heated to extremely high temperatures. Crucibles are available in several sizes and typically come with a correspondingly-sized lid. [20]
Crucible Industries, commonly known as Crucible, is an American company which develops and manufactures specialty steels, and is the sole producer of a line of sintered steels known as Crucible Particle Metallurgy (CPM) steels.
The process can be carried out in a horizontal or vertical orientation, and usually involves a rotating crucible/ampoule to stir the melt. [ 1 ] The Bridgman method is a popular way of producing certain semiconductor crystals such as gallium arsenide , for which the Czochralski method is more difficult.
By the 1870s, the firm, then trading under the easier name of Morgan Crucible, was said to be the largest manufacturer of crucibles in the world. [7] In 1890, Morgan Crucible became a company; it was no longer a family concern although the shares remained in the hands of directors and senior executives, and it remained so until 1946. By 1900 ...
The flux lowers the melting point of the desired compound, analogous to a wet chemistry recrystallization. [1] The flux is molten in a highly stable crucible that does not react with the flux. Metal crucibles, such as platinum , titanium , and niobium are used for the growth of oxide crystals.
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3579 S High St, Columbus, OH · Directions · (614) 409-0683