Preparation and Releasing Hydrogen Characteristic of Al2O3-Coated TiH2 Particles

Abstract

Abstract: The technique to prepare TiH₂ coated with layers of Al₂O₃ particles by heterogeneous nucleation method with HAc-NaAc buffer solution as precipitation reagent was studied. The results show that the microscopic structure of Al₂O₃ coating layers depends on the pHvalue and Al³⁺ concentration range in the solution. The homogeneous and compact coating layers with Al₂O₃-coated TiH₂ particles can be obtained at 0.05 mol/Land pH=4.5, after heating at 350 ℃. The hydrogen releasing of Al₂O₃/TiH₂ particle is notably delayed with the increase of the temperature, and the delay effect can be used in the production of Al foams.

Key words: Coating, Al₂O₃/TiH₂ particle, Releasing hydrogen characteristic, Al foams

CLC Number:

O612

TrendMD:

FANG Ji-Xiang, ZHAO Kang, GU Chen-Qing . Preparation and Releasing Hydrogen Characteristic of Al₂O₃-Coated TiH₂ Particles[J]. Chem. J. Chinese Universities, 2002, 23(9): 1784.

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Preparation and Releasing Hydrogen Characteristic of Al₂O₃-Coated TiH₂ Particles

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