Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 27, Issue 1, Pages 149-154Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2008.06.002
Keywords
Tungsten; Chemical vapor synthesis; Plasma; Nanosized powder; Ammonium paratungstate
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Nanosized tungsten powder was synthesized by a thermal plasma process using ammonium paratungstate (APT) as the precursor. The injected precursor was vaporized in the plasma flame and the subsequent reduction of the vaporized precursor produced nanosized tungsten powder. The effects of H-2 concentration, plasma torch power, and the flow rate of plasma gas on the product properties were investigated and particle size was determined. From the results, nanosized tungsten powder of particle size less than 50 nm was obtained by the thermal plasma process. (C) 2008 Elsevier Ltd. All rights reserved.
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