Abstract
THE technique of zone refining has been applied very successfully to the purification of metals and elements1, especially in the semi-conductor field where very high purity is essential. With some elements, however, it happens that certain impurities have segregation coefficients (ratio of solid to liquid solubility) of the order of unity, and consequently are not swept efficiently by the molten zone.
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References
Pfann, W. G., J. Metals, 747 (July 1952).
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RICHARDS, J. Purification of a Metal by Zone-refining one of its Salts. Nature 177, 182–183 (1956). https://doi.org/10.1038/177182a0
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DOI: https://doi.org/10.1038/177182a0
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