author_facet Tsuyumoto, Isao
Tsuyumoto, Isao
author Tsuyumoto, Isao
spellingShingle Tsuyumoto, Isao
Journal of the American Ceramic Society
Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
Materials Chemistry
Ceramics and Composites
author_sort tsuyumoto, isao
spelling Tsuyumoto, Isao 0002-7820 1551-2916 Wiley Materials Chemistry Ceramics and Composites http://dx.doi.org/10.1111/jace.15250 <jats:title>Abstract</jats:title><jats:p>A hexagonal form of tungsten trioxide (h‐WO<jats:sub>3</jats:sub>, particle size: 15.9‐57.1 nm) was found to be formed by a direct reaction between metallic tungsten powder (W, particle size: 0.45‐0.59 μm) and 15%‐30% hydrogen peroxide (H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>) aq solution. Oxide film on the powder surface having the similar crystal structure as h‐WO<jats:sub>3</jats:sub> was essential for the formation, and the surface oxide film was formed by aging the powder in air at 45°C, a relative humidity of 100% (<jats:italic>P</jats:italic><jats:sub>H2O</jats:sub> 96 hPa) for 3‐28 days or in ambient atmosphere at room temperature for 12 years. The Rietveld analysis performed in the space group <jats:italic>P</jats:italic>6<jats:sub>3</jats:sub>/<jats:italic>mcm</jats:italic> (<jats:italic>Z</jats:italic> = 6) indicated the crystal structures were the same as those of the reported h‐WO<jats:sub>3</jats:sub> and that the crystallographic characteristic was as follows: <jats:italic>a</jats:italic> = 0.74219 nm, <jats:italic>c</jats:italic> = 0.77198 nm for h‐WO<jats:sub>3</jats:sub> from the 28‐day aged powder, and <jats:italic>a</jats:italic> = 0.74538 nm, <jats:italic>c</jats:italic> = 0.77194 nm for h‐WO<jats:sub>3</jats:sub> from the 12‐year aged powder.</jats:p> Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide Journal of the American Ceramic Society
doi_str_mv 10.1111/jace.15250
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Technik
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imprint Wiley, 2018
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publishDateSort 2018
publisher Wiley
recordtype ai
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series Journal of the American Ceramic Society
source_id 49
title Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_unstemmed Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_full Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_fullStr Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_full_unstemmed Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_short Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_sort facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
topic Materials Chemistry
Ceramics and Composites
url http://dx.doi.org/10.1111/jace.15250
publishDate 2018
physical 509-514
description <jats:title>Abstract</jats:title><jats:p>A hexagonal form of tungsten trioxide (h‐WO<jats:sub>3</jats:sub>, particle size: 15.9‐57.1 nm) was found to be formed by a direct reaction between metallic tungsten powder (W, particle size: 0.45‐0.59 μm) and 15%‐30% hydrogen peroxide (H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>) aq solution. Oxide film on the powder surface having the similar crystal structure as h‐WO<jats:sub>3</jats:sub> was essential for the formation, and the surface oxide film was formed by aging the powder in air at 45°C, a relative humidity of 100% (<jats:italic>P</jats:italic><jats:sub>H2O</jats:sub> 96 hPa) for 3‐28 days or in ambient atmosphere at room temperature for 12 years. The Rietveld analysis performed in the space group <jats:italic>P</jats:italic>6<jats:sub>3</jats:sub>/<jats:italic>mcm</jats:italic> (<jats:italic>Z</jats:italic> = 6) indicated the crystal structures were the same as those of the reported h‐WO<jats:sub>3</jats:sub> and that the crystallographic characteristic was as follows: <jats:italic>a</jats:italic> = 0.74219 nm, <jats:italic>c</jats:italic> = 0.77198 nm for h‐WO<jats:sub>3</jats:sub> from the 28‐day aged powder, and <jats:italic>a</jats:italic> = 0.74538 nm, <jats:italic>c</jats:italic> = 0.77194 nm for h‐WO<jats:sub>3</jats:sub> from the 12‐year aged powder.</jats:p>
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author Tsuyumoto, Isao
author_facet Tsuyumoto, Isao, Tsuyumoto, Isao
author_sort tsuyumoto, isao
container_issue 2
container_start_page 509
container_title Journal of the American Ceramic Society
container_volume 101
description <jats:title>Abstract</jats:title><jats:p>A hexagonal form of tungsten trioxide (h‐WO<jats:sub>3</jats:sub>, particle size: 15.9‐57.1 nm) was found to be formed by a direct reaction between metallic tungsten powder (W, particle size: 0.45‐0.59 μm) and 15%‐30% hydrogen peroxide (H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>) aq solution. Oxide film on the powder surface having the similar crystal structure as h‐WO<jats:sub>3</jats:sub> was essential for the formation, and the surface oxide film was formed by aging the powder in air at 45°C, a relative humidity of 100% (<jats:italic>P</jats:italic><jats:sub>H2O</jats:sub> 96 hPa) for 3‐28 days or in ambient atmosphere at room temperature for 12 years. The Rietveld analysis performed in the space group <jats:italic>P</jats:italic>6<jats:sub>3</jats:sub>/<jats:italic>mcm</jats:italic> (<jats:italic>Z</jats:italic> = 6) indicated the crystal structures were the same as those of the reported h‐WO<jats:sub>3</jats:sub> and that the crystallographic characteristic was as follows: <jats:italic>a</jats:italic> = 0.74219 nm, <jats:italic>c</jats:italic> = 0.77198 nm for h‐WO<jats:sub>3</jats:sub> from the 28‐day aged powder, and <jats:italic>a</jats:italic> = 0.74538 nm, <jats:italic>c</jats:italic> = 0.77194 nm for h‐WO<jats:sub>3</jats:sub> from the 12‐year aged powder.</jats:p>
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spelling Tsuyumoto, Isao 0002-7820 1551-2916 Wiley Materials Chemistry Ceramics and Composites http://dx.doi.org/10.1111/jace.15250 <jats:title>Abstract</jats:title><jats:p>A hexagonal form of tungsten trioxide (h‐WO<jats:sub>3</jats:sub>, particle size: 15.9‐57.1 nm) was found to be formed by a direct reaction between metallic tungsten powder (W, particle size: 0.45‐0.59 μm) and 15%‐30% hydrogen peroxide (H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>) aq solution. Oxide film on the powder surface having the similar crystal structure as h‐WO<jats:sub>3</jats:sub> was essential for the formation, and the surface oxide film was formed by aging the powder in air at 45°C, a relative humidity of 100% (<jats:italic>P</jats:italic><jats:sub>H2O</jats:sub> 96 hPa) for 3‐28 days or in ambient atmosphere at room temperature for 12 years. The Rietveld analysis performed in the space group <jats:italic>P</jats:italic>6<jats:sub>3</jats:sub>/<jats:italic>mcm</jats:italic> (<jats:italic>Z</jats:italic> = 6) indicated the crystal structures were the same as those of the reported h‐WO<jats:sub>3</jats:sub> and that the crystallographic characteristic was as follows: <jats:italic>a</jats:italic> = 0.74219 nm, <jats:italic>c</jats:italic> = 0.77198 nm for h‐WO<jats:sub>3</jats:sub> from the 28‐day aged powder, and <jats:italic>a</jats:italic> = 0.74538 nm, <jats:italic>c</jats:italic> = 0.77194 nm for h‐WO<jats:sub>3</jats:sub> from the 12‐year aged powder.</jats:p> Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide Journal of the American Ceramic Society
spellingShingle Tsuyumoto, Isao, Journal of the American Ceramic Society, Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide, Materials Chemistry, Ceramics and Composites
title Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_full Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_fullStr Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_full_unstemmed Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_short Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_sort facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
title_unstemmed Facile synthesis of nanocrystalline hexagonal tungsten trioxide from metallic tungsten powder and hydrogen peroxide
topic Materials Chemistry, Ceramics and Composites
url http://dx.doi.org/10.1111/jace.15250