Hydrogen-induced phase decomposition of Ba7Al13 and the crystal structure of Ba2AlH7

Q. A. Zhang, Y. Nakamura, K. Oikawa, T. Kamiyama, E. Akiba

研究成果: ジャーナルへの寄稿学術誌査読

22 被引用数 (Scopus)

抄録

The hydrogenation characteristics of Ba7Al13 have been studied under a hydrogen pressure of 7 MPa at different temperatures for 5 days. Ba7Al13 reacts with hydrogen to form BaAlH 5 and Al between 373 and 553 K. When the temperature is in the range from 553 to 603 K, Ba7Al13 is hydrogenated to Ba 2AlH7 and Al. However, further increasing the temperature leads to the hydrogen-induced decomposition of Ba7Al13 into Ba2AlH7 and BaAl4. The crystal structure of Ba2AlD7 was also studied by neutron powder diffraction. Ba2AlD7 is isostructural to Sr2AlD 7, crystallizing with a monoclinic structure in space group I2/a. The lattice parameters were determined as a=13.197(3) Å, b=10.237(2) Å, c=8.509(2) Å, β=101.290(9)°.

本文言語英語
ページ(範囲)180-186
ページ数7
ジャーナルJournal of Alloys and Compounds
361
1-2
DOI
出版ステータス出版済み - 10月 27 2003
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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