このエントリーをはてなブックマークに追加
ID 20038
本文ファイル
著者
Okamoto, Keisuke
Tokoyoda, Kazuhiko
Fujii, Hironobu
キーワード
hydrogen storage materials
mechanochemical synthesis
X-ray diffraction
thermal analysis
NDC
物理学
抄録(英)
We successfully established a method to synthesize the Li-Mg-N-H hydrogen storage system composed of Mg(NH2)2 and LiH from Mg and LiNH2 as starting materials. First of all, Mg and Li2NH were homogeneously mixed by ball-milling for 2 h under 1 MPa argon atmosphere. After that, the mixture was heat-treated at 250 °C for 16 h under vacuum condition to be transformed into Mg3N2 and Li2NH. Target materials, Mg(NH2)2 and LiH, were synthesized by a further heat-treatment for Mg3N2 and Li2NH at 200 °C under 10 MPa hydrogen atmosphere for 12 h. The phases in the sample at each processing stage were examined by X-ray diffraction and Fourier transformation infra-red absorption measurements and confirmed to be the expected ones. From experimental results of a thermal desorption mass spectroscopy, the final hydrogenated sample indicated that ~7 mass% hydrogen was desorbed starting from about 150 °C and peaked around 230 °C under helium flow condition at 5 °C/min heating rate without ammonia emission in our experimental accuracy.
掲載誌名
Journal of Alloys and Compounds
432巻
1-2号
開始ページ
289
終了ページ
292
出版年月日
2007-04-25
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
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