UHPM - 95
J. Phys. IV France 05 (1995) C7-153-C7-157
Purification of Ultra-High Purity AluminumE. 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
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