| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydrogen occlusion material which can increase hydrogen emitting efficiency without deteriorating hydrogen occluding efficiency of the hydrogen occlusion material and shorten time required for grinding/mixing treatment to the hydrogen occlusion material and a catalyst. SOLUTION: Magnesium hydride MgH<SB>2</SB>particles of 2.3 g and niobium oxide particles Nb<SB>2</SB>0<SB>5</SB>of 2.3 g as a catalyst are weighed and then, charged into a zirconium oxide-made pot of a gear system-driven planetary ball mill. Further, the zirconium oxide-made ball with 4 mmϕdia. is charged into the pot so as to allow the ball packing to be 18 vol.%, and then, MgH<SB>2</SB>and Nb<SB>2</SB>0<SB>5</SB>inside the pot are given a maximum acceleration of gravity of 150 G for 20 min by rotating the pot to obtain the hydrogen occlusion material. Through evaluation of the hydrogen occlusion material, a microstructure development is found in progress by only 10 min treatment. Also, it is confirmed that the hydrogen occlusion material possesses such a high hydrogen occluding capability of about not less than 3 wt.% and also, the occluded hydrogen can be emitted at lower temperatures such as about 230°C. COPYRIGHT: (C)2009,JPO&INPIT
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