Effects of crystallization atmospheres on the near-infrared absorbtion and electroconductive properties of tungsten bronze type M x W O 3 (M = Na, K)

Chongshen Guo; Shu Yin; Tsugio Sato

doi:10.1111/j.1551-2916.2011.05039.x

Effects of crystallization atmospheres on the near-infrared absorbtion and electroconductive properties of tungsten bronze type M _x W O ₃ (M = Na, K)

Chongshen Guo^*
, Shu Yin
, Tsugio Sato

^*Corresponding author for this work

Tohoku University

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

67 Scopus citations

Abstract

The fine particles of tetragonal K _xWO ₃ and cubic Na _xWO ₃ were successfully synthesized by reducing WO ₄ ^2- with BH ₄ ^- in aqueous solutions, followed by the crystallization of amorphous precursors by calcination under N ₂, NH ₃ and H ₂ (5 vol%)/N ₂ atmospheres at 600°C for 1 h, respectively. The products showed excellent electrical conductivity, visible light transparency, and near-infrared light shielding characteristics, where the samples crystallized in H ₂ (5 vol%)/N ₂ mixed gas showed the highest electric conductivity being superior to commercial conductive oxide ITO. Meanwhile, the samples showed strong absorption of near-infrared light and instantaneous conversion of photo-energy to local heat. The effects of crystallization atmosphere on the near-infrared absorbtion and electroconductivity properties of K _xWO ₃ and Na _xWO ₃ are discussed in detail.

Original language	English
Pages (from-to)	1634-1639
Number of pages	6
Journal	Journal of the American Ceramic Society
Volume	95
Issue number	5
DOIs	https://doi.org/10.1111/j.1551-2916.2011.05039.x
State	Published - May 2012
Externally published	Yes

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title = "Effects of crystallization atmospheres on the near-infrared absorbtion and electroconductive properties of tungsten bronze type M x W O 3 (M = Na, K)",

abstract = "The fine particles of tetragonal K xWO 3 and cubic Na xWO 3 were successfully synthesized by reducing WO 4 2- with BH 4 - in aqueous solutions, followed by the crystallization of amorphous precursors by calcination under N 2, NH 3 and H 2 (5 vol\%)/N 2 atmospheres at 600°C for 1 h, respectively. The products showed excellent electrical conductivity, visible light transparency, and near-infrared light shielding characteristics, where the samples crystallized in H 2 (5 vol\%)/N 2 mixed gas showed the highest electric conductivity being superior to commercial conductive oxide ITO. Meanwhile, the samples showed strong absorption of near-infrared light and instantaneous conversion of photo-energy to local heat. The effects of crystallization atmosphere on the near-infrared absorbtion and electroconductivity properties of K xWO 3 and Na xWO 3 are discussed in detail.",

author = "Chongshen Guo and Shu Yin and Tsugio Sato",

year = "2012",

month = may,

doi = "10.1111/j.1551-2916.2011.05039.x",

language = "英语",

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TY - JOUR

T1 - Effects of crystallization atmospheres on the near-infrared absorbtion and electroconductive properties of tungsten bronze type M x W O 3 (M = Na, K)

AU - Guo, Chongshen

AU - Yin, Shu

AU - Sato, Tsugio

PY - 2012/5

Y1 - 2012/5

N2 - The fine particles of tetragonal K xWO 3 and cubic Na xWO 3 were successfully synthesized by reducing WO 4 2- with BH 4 - in aqueous solutions, followed by the crystallization of amorphous precursors by calcination under N 2, NH 3 and H 2 (5 vol%)/N 2 atmospheres at 600°C for 1 h, respectively. The products showed excellent electrical conductivity, visible light transparency, and near-infrared light shielding characteristics, where the samples crystallized in H 2 (5 vol%)/N 2 mixed gas showed the highest electric conductivity being superior to commercial conductive oxide ITO. Meanwhile, the samples showed strong absorption of near-infrared light and instantaneous conversion of photo-energy to local heat. The effects of crystallization atmosphere on the near-infrared absorbtion and electroconductivity properties of K xWO 3 and Na xWO 3 are discussed in detail.

AB - The fine particles of tetragonal K xWO 3 and cubic Na xWO 3 were successfully synthesized by reducing WO 4 2- with BH 4 - in aqueous solutions, followed by the crystallization of amorphous precursors by calcination under N 2, NH 3 and H 2 (5 vol%)/N 2 atmospheres at 600°C for 1 h, respectively. The products showed excellent electrical conductivity, visible light transparency, and near-infrared light shielding characteristics, where the samples crystallized in H 2 (5 vol%)/N 2 mixed gas showed the highest electric conductivity being superior to commercial conductive oxide ITO. Meanwhile, the samples showed strong absorption of near-infrared light and instantaneous conversion of photo-energy to local heat. The effects of crystallization atmosphere on the near-infrared absorbtion and electroconductivity properties of K xWO 3 and Na xWO 3 are discussed in detail.

UR - https://www.scopus.com/pages/publications/84862798500

U2 - 10.1111/j.1551-2916.2011.05039.x

DO - 10.1111/j.1551-2916.2011.05039.x

M3 - 文章

AN - SCOPUS:84862798500

SN - 0002-7820

VL - 95

SP - 1634

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JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 5

ER -

Effects of crystallization atmospheres on the near-infrared absorbtion and electroconductive properties of tungsten bronze type M _x W O ₃ (M = Na, K)

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