Oxygen partial pressure effect on the preparation of nanocrystalline tungsten oxide powders by a plasma arc gas condensation technique

Cherng Yuh Su; Chung Kwei Lin; Tsung Kun Yang; Hsuan Ching Lin; Cheng Tang Pan

doi:10.1016/j.ijrmhm.2007.09.006

Oxygen partial pressure effect on the preparation of nanocrystalline tungsten oxide powders by a plasma arc gas condensation technique

Cherng Yuh Su, Chung Kwei Lin, Tsung Kun Yang, Hsuan Ching Lin, Cheng Tang Pan

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

In the present study, nanocrystalline tungsten oxide powders were prepared by a plasma arc gas condensation technique under a controlled oxygen environment with Ar/O₂ ratio ranged from 1/1 to 100/1. It is noted that stoichiometric tungsten oxide nanocrystalline powders (WO₃) can be prepared under an Ar/O₂ ratio ranged from 1/1 to 99/1, while nonstoichiometric tungsten oxide nanopowders (WO_3-x) were synthesized under an Ar/O₂ ratio of 100/1. The as-prepared WO₃ powders were examined by X-ray diffraction (XRD), Raman scattering, thermal gravimetric analysis (TGA), and high-resolution transmission electron microscope (HRTEM). Experimental results showed that yellowish WO₃ nanopowders prepared using different Ar/O₂ ratio exhibited slight differences.

Original language	English
Pages (from-to)	423-428
Number of pages	6
Journal	International Journal of Refractory Metals and Hard Materials
Volume	26
Issue number	5
DOIs	https://doi.org/10.1016/j.ijrmhm.2007.09.006
Publication status	Published - Sept 2008
Externally published	Yes

Keywords

Gas condensation
HRTEM
Nanocrystalline powders
Nanorods
Plasma arc
Tungsten oxide

ASJC Scopus subject areas

Mechanics of Materials
Ceramics and Composites
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.ijrmhm.2007.09.006

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title = "Oxygen partial pressure effect on the preparation of nanocrystalline tungsten oxide powders by a plasma arc gas condensation technique",

abstract = "In the present study, nanocrystalline tungsten oxide powders were prepared by a plasma arc gas condensation technique under a controlled oxygen environment with Ar/O2 ratio ranged from 1/1 to 100/1. It is noted that stoichiometric tungsten oxide nanocrystalline powders (WO3) can be prepared under an Ar/O2 ratio ranged from 1/1 to 99/1, while nonstoichiometric tungsten oxide nanopowders (WO3-x) were synthesized under an Ar/O2 ratio of 100/1. The as-prepared WO3 powders were examined by X-ray diffraction (XRD), Raman scattering, thermal gravimetric analysis (TGA), and high-resolution transmission electron microscope (HRTEM). Experimental results showed that yellowish WO3 nanopowders prepared using different Ar/O2 ratio exhibited slight differences.",

keywords = "Gas condensation, HRTEM, Nanocrystalline powders, Nanorods, Plasma arc, Tungsten oxide",

author = "Su, {Cherng Yuh} and Lin, {Chung Kwei} and Yang, {Tsung Kun} and Lin, {Hsuan Ching} and Pan, {Cheng Tang}",

year = "2008",

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T1 - Oxygen partial pressure effect on the preparation of nanocrystalline tungsten oxide powders by a plasma arc gas condensation technique

AU - Su, Cherng Yuh

AU - Lin, Chung Kwei

AU - Yang, Tsung Kun

AU - Lin, Hsuan Ching

AU - Pan, Cheng Tang

PY - 2008/9

Y1 - 2008/9

N2 - In the present study, nanocrystalline tungsten oxide powders were prepared by a plasma arc gas condensation technique under a controlled oxygen environment with Ar/O2 ratio ranged from 1/1 to 100/1. It is noted that stoichiometric tungsten oxide nanocrystalline powders (WO3) can be prepared under an Ar/O2 ratio ranged from 1/1 to 99/1, while nonstoichiometric tungsten oxide nanopowders (WO3-x) were synthesized under an Ar/O2 ratio of 100/1. The as-prepared WO3 powders were examined by X-ray diffraction (XRD), Raman scattering, thermal gravimetric analysis (TGA), and high-resolution transmission electron microscope (HRTEM). Experimental results showed that yellowish WO3 nanopowders prepared using different Ar/O2 ratio exhibited slight differences.

AB - In the present study, nanocrystalline tungsten oxide powders were prepared by a plasma arc gas condensation technique under a controlled oxygen environment with Ar/O2 ratio ranged from 1/1 to 100/1. It is noted that stoichiometric tungsten oxide nanocrystalline powders (WO3) can be prepared under an Ar/O2 ratio ranged from 1/1 to 99/1, while nonstoichiometric tungsten oxide nanopowders (WO3-x) were synthesized under an Ar/O2 ratio of 100/1. The as-prepared WO3 powders were examined by X-ray diffraction (XRD), Raman scattering, thermal gravimetric analysis (TGA), and high-resolution transmission electron microscope (HRTEM). Experimental results showed that yellowish WO3 nanopowders prepared using different Ar/O2 ratio exhibited slight differences.

KW - Gas condensation

KW - HRTEM

KW - Nanocrystalline powders

KW - Nanorods

KW - Plasma arc

KW - Tungsten oxide

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ER -

Oxygen partial pressure effect on the preparation of nanocrystalline tungsten oxide powders by a plasma arc gas condensation technique

Abstract

Keywords

ASJC Scopus subject areas

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