Coating Process of Silica Film on TiH2 Particles and Hydrogen Release Characteristics

Abstract

Abstract: The coating process of TiH₂ particles with SiO₂ layers, and the effect of the coating layer on hydrogen release characteristic of TiH₂ powders were studied experimentally. The gelation rate of silicic acid is an important factor for controlling the surface morphologies of coating layers. When the concentration of SiO^2-₃ is about 0.5 mol/L, the condensation rate of silicic acid is appropriate for the formation of a homogeneous and dense coating membrane. The results of hydrogen release at 700 ℃ show that TiH₂ particles coated with silicon dioxide layers can efficiently delay the starting time of hydrogen release of TiH₂ powders to 60-100 s.

Key words: Coating, SiO₂/TiH₂ particle, Hydrogen release characteristics, Al foams

CLC Number:

O612

TrendMD:

FANG Ji-Xiang, YANG Zhi-Mao, DING Bing-Jun. Coating Process of Silica Film on TiH₂ Particles and Hydrogen Release Characteristics[J]. Chem. J. Chinese Universities, 2005, 26(7): 1225.

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Coating Process of Silica Film on TiH₂ Particles and Hydrogen Release Characteristics

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