Alundum

[uh-luhn-duhm]

Trademark.

1. a brand name for a substance consisting of fused alumina, used chiefly as an abrasive and as a refractory.

Alundum

/ əˈlʌndəm /

noun

1. a hard material composed of fused alumina, used as an abrasive and a refractory

Example Sentences

Bauxite simply fused in the electric furnace makes a better abrasive than the natural emery or corundum, and it is sold for this purpose under the name of "aloxite," "alundum," "exolon," "lionite" or "coralox."

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When the fused bauxite is worked up with a bonding material into crucibles or muffles and baked in a kiln it forms the alundum refractory ware.

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Since alundum is porous and not attacked by acids it is used for filtering hot and corrosive liquids that would eat up filter-paper.

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Porous crucibles of a material known as alundum may also be employed to advantage in special cases.

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