Intrinsic and mechanically modified thermal stabilities of α-, β- and γ-aluminum trihydrides AlH3

S. Orimo, Y. Nakamori, T. Kato, C. Brown, C. M. Jensen

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

The intrinsic and mechanically modified thermal stabilities of the α-, β-, and γ-phases of AlH3 have been experimentally determined. The thermogravimetric profiles of the α- and γ-phases exhibit dehydriding reactions in the temperature range of 370-450 K. The amounts of hydrogen released are nearly 9 mass∈%. The profile of the β-phase shows the continuous dehydriding reactions, which differs from the other two phases. The values of the enthalpy of dehydriding reactions ΔHdehyd. are determined to be 6.0±1.5, -3∼-5 and 1.0±0.5 kJ/mol∈H2 for the α-, β- and γ-phases, respectively. The milling-time dependences of the powder X-ray diffraction measurement and thermal analyses indicate the occurrence of the dehydriding reactions both in the α- and γ-phases during milling, but there is no drastic change in the β-phase.

Original languageEnglish
Pages (from-to)5-8
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume83
Issue number1
DOIs
Publication statusPublished - 2006 Apr 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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