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Formation and crystal growth process of AlH$$_{3}$$ in Al-H system

Al-H系におけるAlH$$_{3}$$の生成・成長過程

齋藤 寛之; 岡島 由佳; 米田 安宏; 町田 晃彦; 川名 大地; 綿貫 徹; 片山 芳則; 青木 勝敏

Saito, Hiroyuki; Okajima, Yuka; Yoneda, Yasuhiro; Machida, Akihiko; Kawana, Daichi; Watanuki, Tetsu; Katayama, Yoshinori; Aoki, Katsutoshi

The hydrogenation process of aluminum is observed at high pressure and temperature by angle-dispersive ${it in situ}$ X-ray diffraction method. At 10 GPa and 600 $$^{circ}$$C, single crystals of AlH$$_{3}$$ about 20 $$mu$$m in size are found to grow through three steps: self-pulverization of aluminum, hydrogenation of pulverized aluminum, and solid-state grain growth of hydride. The self-pulverization seems to be the precursor of the hydrogenation reaction because it occurs at pressure temperature conditions where AlH$$_{3}$$ is thermodynamically stable.

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パーセンタイル:35.47

分野:Chemistry, Physical

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