A modified plasma arc gas condensation technique to synthesize nanocrystalline tungsten oxide powders

Cherng Yuh Su, Chung Kwei Lin, Chia Wei Cheng

研究成果: 雜誌貢獻文章同行評審

13 引文 斯高帕斯(Scopus)

摘要

In the present study, nanocrystalline tungsten oxide powders were prepared by a modified plasma arc gas condensation technique where a gas nozzle was introduced to provide blowing gas. With the aid of the blowing gases, nanocrystalline tungsten oxide powders can be prepared under various chamber pressures ranged from 4.9 to 101.3kPa. The mean grain size and powder production rate of the as-prepared nanocrystalline WO3 powders increased with increasing chamber pressure. For an increasing chamber pressure from 4.9 to 101.3 kPa, asignificant increase in powder production rate from 0.374 to 13.658 g/h can be noticed, while the mean grain size only enlarged acceptably from 5.9 to 15.7 nm. Meanwhile, by controlling the partial oxygen pressure of the mixed gas, nanocrystalline blue tungsten oxide powders can be prepared successfully. The blowing mixed gas from the nozzle not only suppressed the nucleation and growth for powders from the gas phase, but can be used to prepare stoichiometric or nonstoichiometric tungsten oxide powders.
原文英語
頁(從 - 到)1016-1020
頁數5
期刊Materials Transactions
46
發行號5
DOIs
出版狀態已發佈 - 五月 2005
對外發佈

ASJC Scopus subject areas

  • 材料科學(全部)
  • 金屬和合金

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