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Synthesis of ultrafine titanium aluminide powders and their catalytic enhancement in dehydrogenation kinetics of NaAlH4

Author:
Lee, Gil-Jae  Kim, Ji Woo  Shim, Jae-Hyeok  Cho, Young Whan  Lee, Kyung Sub  


Journal:
SCRIPTA MATERIALIA


Issue Date:
2007


Abstract(summary):

Titanium aluminide powders with various sizes have been synthesized using four different mechanochemical reactions. While the reaction between TiCl3, AlCl3 and Mg produces TiAl3 nanopowder with a primary particle size of about 50 nm, the use of LiH instead of Mg results in the formation of Ti2Al5. These titanium aluminide powders reveal a considerable catalytic effect on dehydrogenation of NaAlH4. It is also found that the catalytic effect is particle-size dependent. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.


Page:
125---128


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