水素同位体分離カラム充填材用のPd被覆を施したMo粉末の評価

概要

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Palladium-coated Mo powder was prepared by a barrel sputtering system as packing materials of gas chromatograph for hydrogen isotope separation. The crystal structure and hydrogen absorption of prepared material were examined to evaluate the applicability to hydrogen isotope separation column. The diffraction peaks of the Pd layer of the prepared material without any treatment were broad, indicating that the Pd layer includes strains and/or many fine crystallites. The prepared material without any treatment was absorbed hydrogen at 343 K. The hydrogen absorption isotherms of the prepared materials did not showed a flat plateau. On the other hand, prepared materials with vacuum heating at 1073 K were lost the hydrogen absorption ability. The unknown peaks were appeared with vacuum heating. This loss of the ability is due to the reaction with the Pd layer and Mo powder.