Abstract
THE special properties of aluminium refined by double electrolysis and of conventional purity 99.99–99.998 per cent are well known. We have considered the application to this material of the ‘zone fusion’ process, which permits the production of germanium of extreme purity1. In our experiments we have employed a bar of such refined aluminium about 40 cm. long and 4 cm.2 in cross-section. This bar was placed in a boat of pure alumina and a length of 6–8 cm. raised to the molting point in a high-frequency furnace, the zone of fusion being traversed through the furnace at the rate of 5 mm. an hour.
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References
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CHAUDRON, G. Preparation of Aluminium of Extreme Purity by the ‘Zone Fusion’ Process. Nature 174, 923 (1954). https://doi.org/10.1038/174923a0
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DOI: https://doi.org/10.1038/174923a0
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