Journal of Thermal Analysis and Calorimetry

, Volume 96, Issue 1, pp 141–145 | Cite as

Effect of heating rates on TG-DTA results of aluminum nanopowders prepared by laser heating evaporation

Regular Papers Material Sciences

Abstract

Aluminum (Al) nanopowders with mean diameter of about 50 nm and passivated by alumina (Al2O3) coatings were prepared by an evaporation route: laser heating evaporation. Thermal properties of the nanopowders were investigated by simultaneous thermogravimetric-differential thermal analysis (TG-DTA) in dry oxygen environment, using a series of heating rates (5, 10, 20, 30, 50 and 90°C min−1) from room temperature to 1200°C. With the heating rates rise, the onset and peak temperatures of the oxidation rise, and the conversion degree of Al to Al2O3 varies. However, the specific heat release keeps relatively invariant and has an average value of 18.1 kJ g−1. So the specific heat release is the intrinsic characteristic of Al nanopowders, which can represent the ability of energy release.

Keywords

aluminum energetic materials nanopowders reactivity TG-DTA 

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • L. Chen
    • 1
  • W. L. Song
    • 1
    • 2
  • J. Lv
    • 1
  • L. Wang
    • 2
  • C. S. Xie
    • 1
  1. 1.State Key Laboratory of Material Processing and Die and Mould TechnologyHuazhong University of Science and TechnologyWuhanP.R. China
  2. 2.Analytical and Testing CenterHuazhong University of Science and TechnologyWuhanP. R. China

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