高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (7): 1225.

• 研究简报 • 上一篇    下一篇

SiO2/TiH2包覆粉体的制备及其释氢特性

方吉祥, 杨志懋, 丁秉钧   

  1. 西安交通大学理学院金属材料强度国家重点实验室, 西安710049
  • 收稿日期:2004-10-09 出版日期:2005-07-10 发布日期:2005-07-10
  • 通讯作者: 杨志懋(1968年出生),男,博士,教授,主要从事纳米功能材料研究.E-mail:zmyang@mail.xjtu.edu.cn E-mail:zmyang@mail.xjtu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:50271050和50471033)资助

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

FANG Ji-Xiang, YANG Zhi-Mao, DING Bing-Jun   

  1. State Key Laboratory for Mechanical Behavior of Materials, School of Science, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2004-10-09 Online:2005-07-10 Published:2005-07-10

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关键词: 包覆, SiO2/TiH2颗粒, 释氢特性, 泡沫铝

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 SiO2-3 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

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