Aluminum Hydride Polymorphs: Preparation, Characterization and Thermal Properties

Bo Xu; Ji Ping Liu

doi:10.4028/www.scientific.net/AMR.712-715.333

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 712-715Aluminum Hydride Polymorphs: Preparation,...

Aluminum Hydride Polymorphs: Preparation, Characterization and Thermal Properties

Abstract:

Two aluminum hydride polymorphs (α-AlH₃ and β-AlH₃) were prepared by desolvation of AlH₃-etherate based on the organometallic synthesis method and the thermal properties of them were investigated using TG-DSC and ex situ XRD under heating and isothermal processes. The results suggest that the α polymorph is more stable than the β polymorph, and the decomposition of the less stable polymorph, β-AlH₃, occurs by an exothermic transformation to the α phase followed by the decomposition of α-AlH₃ into Al and H₂, with partial direct decomposition occurring in the process of phase transition at low temperatures (<100 C).

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Advanced Materials Research (Volumes 712-715)

Pages:

333-336

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.712-715.333

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Online since:

June 2013

Authors:

Bo Xu, Ji Ping Liu

Keywords:

Aluminum Hydride, Phase Stability, Thermal Property

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