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zone melting

noun
  1. a process of purifying any of various metals and other materials, as germanium or silicon, by passing it in bar form through an induction coil.
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Compare cage zone melting.

Origin of zone melting

First recorded in 1955–60
Also called zone refining.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for zone refining

zone refining

noun
  1. a technique for producing solids of extreme purity, esp for use in semiconductors. The material, in the form of a bar, is melted in one small region that is passed along the solid. Impurities concentrate in the melt and are moved to the end of the bar
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012