Zone refining


a process of purifying any of various metals and other materials, as germanium or silicon, by p-ssing it in bar form through an induction coil.
noun
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 p-ssed along the solid. impurities concentrate in the melt and are moved to the end of the bar

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