zone refining

noun

Definition of zone refining 

: a technique for the purification of a crystalline material and especially a metal in which a molten region travels through the material to be refined, picks up impurities at its advancing edge, and then allows the purified part to recrystallize at its opposite edge

called also zone melting

Other Words from zone refining

zone-refined adjective

First Known Use of zone refining

1952, in the meaning defined above

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The first known use of zone refining was in 1952

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