The Effects of Oxygen Concentration on the Hydrogen Absoiption Properties of the Zr_(57)V_(36)Fe_7 Getter Alloy

摘要

The effects of the oxygen concentration on the hydrogen sorption properties of an NEG(non-evaporable getter) alloy, Zr_(57)V_(36)Fe_7, were investigated. The desired level of the oxygen concentration was obtained by letting an argon gas with 2.98 vol perent O_2 flow through a tube furnace containing the alloy powder at 423 K for a predetermined time period. The sorption speed of the alloy decreased almost linearly with the increase of the oxygen concentration. The reason for this can be explained as follows: the activated metal surface area decreases with the increase of the oxygen concentration and the activation of the metal surface covered with oxygen requires more energy to remove it.