Definition of zone refining in English:

zone refining

noun

  • A method of purifying a crystalline solid, typically a semiconductor or metal, by causing a narrow molten zone to travel slowly along an otherwise solid rod or bar to one end, at which impurities become concentrated.

    ‘The Cd, Te, or CdTe is preferably added prior to zone refining at the leading end or head of the ingot.’
    • ‘The technique of zone refining has been applied very successfully to the purification of metals and elements, especially in the semi-conductor field where very high purity is essential.’
    • ‘The key parameters for zone refining, number of zone passes, zone length, translation rate will be optimized for each compound.’
    • ‘The key challenge in zone refining is that impurity levels and other process variables vary throughout the ingot.’