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ID 20039
本文ファイル
著者
Nakagawa, Tessui
Iida, Ryo
Leng, Haiyan
Takeichi, Nobuhiko
Kiyobayashi, Tetsu
Takeshita, Hiroyuki
Fujii, Hironobu
キーワード
hydrogen absorbing materials
crystal growth
gas-solid reactions
X-ray diffraction
NDC
物理学
抄録(英)
The in-situ XRD measurements on dehydrogenation/rehydrogenation of the Li-Mg-N-H system were performed in this work. The ballmilled mixture of 8LiH and 3Mg(NH2)2 as a hydrogenated phase gradually changed into Li2NH as a dehydrogenated phase during heat-treatment at 200 °C in vacuum for 50 h. Neither Mg-related phases nor other intermediate phases were recognized in the dehydrogenated phase. With respect to the hydrogenation process, the dehydrogenated state gradually returned to the mixed phase of the LiH and Mg(NH2)2 without appearance of any intermediate phases during heat treatment at 200 °C under 5 MPa H2 for 37 h and during slow cooling down to room temperature through 24 h. In the hydrogenation process at 200 °C under 1 MPa H2, however, the growing up of the LiNH2 and LiH phase was observed in the XRD profiles before the 3Mg(NH2)2 and 8LiH phases were formed as the final hydrogenated state. This indicates that the LiNH2 and LiH phase essentially appears as an intermediate state in the Li-Mg-N-H system composed of 3Mg(NH2)2 and 8LiH.
掲載誌名
Journal of Alloys and Compounds
430巻
1-2号
開始ページ
217
終了ページ
221
出版年月日
2007-03-14
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
先端物質科学研究科
自然科学研究支援開発センター
先進機能物質研究センター