Abstract
Chemical analyses and measurements of hydrogen storage properties have been carried out on samples prepared by melting a standard sample of FeTi1.13 in graphite, Al2O3, MgO and ZrO2 crucibles; this standard sample was prepared by use of a water-cooled crucible of copper. The carbon contamination of the sample melted in the graphite crucible was less than 0.1 mass%, and the hydrogen storage property of the sample was nearly the same as that of the standard sample. On the other hand, the impurity contamination of the samples melted in the Al2O3, MgO and ZrO2 crucibles was remarkable, and the amounts of hydrogen stored in these samples were much smaller than that of the standard sample. The hydrogen storage properties of the samples melted in the MgO and ZrO2 crucibles which were used twice were not inferior to that of the standard sample, but the erosion of the crucibles successivley occurred in their repeated uses. It is concluded that a graphite crucible is suitable for the mass production of FeTi.
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