Numéro
J. Phys. IV France
Volume 05, Numéro C7, Novembre 1995
Second International Conference on Ultra High Purity Base Metals
UHPM - 95
Page(s) C7-153 - C7-157
DOI https://doi.org/10.1051/jp4:1995715
Second International Conference on Ultra High Purity Base Metals
UHPM - 95

J. Phys. IV France 05 (1995) C7-153-C7-157

DOI: 10.1051/jp4:1995715

Purification of Ultra-High Purity Aluminum

E. Hashimoto1, Y. Ueda1 and T. Kino2

1  Laboratory of Crystal Physics, Faculty of Science, Hiroshima University, Higashi-Hiroshima 739, Japan
2  Hiroshima-Denki Institute of Technology, Hiroshima 739-03, Japan


Abstract
Zone refining was applied experimentally to high-purity aluminium produced by a combination of the three-layer electrolytic refining process and the segregation process. The cropping procedure was effective in increasing the efficiency of zone refining. The highest residual resistance ratio R(300K)/R(4.2K) obtained was more than 150 000 in the bulk value, corresponding to a refined purity better than 99.99999 %.



© EDP Sciences 1995