Comparison of different tungsten precursors for preparation of tungsten nanopowder by RF induction thermal plasma

Tungsten nanopowders were synthesized using three different precursors: commercial tungsten (W), tungsten trioxide (WO3), and ammonium paratungstate (APT) by radio-frequency (RF) induction thermal plasma in the presence and absence of H2. The crystalline structure, morphology, and particle size of t...

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Bibliographic Details
Published in:International journal of refractory metals & hard materials 2020-01, Vol.86, p.104995, Article 104995
Main Authors: Shin, Dongyoon, Swain, Basudev, Han, Chulwoong, Kim, Yonghwan, Lee, Chan-Gi, Park, Kyung-Soo
Format: Article
Language:English
Subjects:
Electron microscopes
Electron microscopy
Emission analysis
Field emission microscopy
Microscopy
Morphology
Nanoparticles
Nanopowder
Precursors
Radio frequency
RF induction thermal plasma
Spherodization
Synthesis
Thermal plasmas
Tungsten
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Summary:Tungsten nanopowders were synthesized using three different precursors: commercial tungsten (W), tungsten trioxide (WO3), and ammonium paratungstate (APT) by radio-frequency (RF) induction thermal plasma in the presence and absence of H2. The crystalline structure, morphology, and particle size of the synthesized tungsten nanopowders were analyzed by X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. The W nanopowder obtained using APT precursor was found to be the most homogeneous and smallest nanoparticles and showed the largest α-W phase (stable) fraction, which is the preferred phase for tungsten because of its superior properties to those of the β-W phase (metastable). •Tungsten nanopowder was synthesized by RF induction thermal plasma.•Three different commercial W, WO3, and APT precursors were compared.•In all cases of the precursors, in the presence of H2, W nanopowder was synthesized.•Precursor APT could provide W nanopowder of better quality than W and WO3.
ISSN:0263-4368
2213-3917
DOI:10.1016/j.ijrmhm.2019.104995