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ID 23399
本文ファイル
著者
Hanada, Nobuko
Enoki, Hirotoshi
Akiba, Etsuo
Fujii, Hironobu
キーワード
hydrogen absorbing materials
ball-milling
microstructure
scanning electron microscopy
SEM
transmission electron microscopy
TEM
NDC
物理学
抄録(英)
The microstructures of MgH2 catalyzed with Ni nano-particle or Nb2O5 mesoporous powders are examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations. For MgH2 catalyzed with Ni, the Ni particles with the diameter smaller than 1 μm were detected on the MgH2 particles with the diameter smaller than 5 μm by the back scattering electron (BSE) microscopy. In details, the TEM micrograph indicates that the Ni particles distribute ~20 nm in diameter on MgH2 uniformly, which was the same size as the additive doped in MgH2 before milling. On the other hand, for MgH2 catalyzed with Nb2O5, the additive particles could not be found anywhere in the BSE image. Even in the TEM micrograph by much larger magnification than the SEM micrograph, the particles corresponding to the additive can not be observed at all. Furthermore, an energy dispersive X-ray (EDX) analysis in spots with a diameter of 20 nm indicated that the existing ratio of Mg to Nb was evaluated to 98:2, being the same as the starting ratio before milling. Therefore, the metal oxide Nb2O5 becomes extremely small particle that could not be observed by the present work after milling compared to metal Ninano.
掲載誌名
Journal of Alloys and Compounds
450巻
1-2号
開始ページ
395
終了ページ
399
出版年月日
2008-02
出版者
Elsevier B.V.
ISSN
0925-8388
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2006 Elsevier B.V.
関連情報URL
部局名
先進機能物質研究センター