Synthesis of nanoscale particles of Ta and Nb<sub>3</sub>Al by homogeneous reduction in liquid ammonia

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Published
2001-09
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  • https://www.cambridge.org/core/terms
DOI
  • 10.1557/jmr.2001.0348
Publisher
Springer Science and Business Media LLC

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<jats:p>The analysis of metallothermic reduction as an electronically mediated reaction predicted that the particle size of solid product could be reduced if the reaction were conducted in a medium that is a mixed conductor (ionic and electronic). This prediction was confirmed by reacting TaCl<jats:sub>5</jats:sub> with sodium, each dissolved in liquid ammonia, to produce tantalum powder having an average particle size over an order of magnitude finer than the micron-sized powders produced commercially today. Metallothermic reduction in a mixed conducting medium has been extended to a multicomponent system in order to synthesize nanosized powder of Nb<jats:sub>3</jats:sub>Al by co-reduction of NbCl<jats:sub>5</jats:sub> and AlCl<jats:sub>3</jats:sub> both dissolved in liquid ammonia.</jats:p>

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