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

    Research output: Contribution to journalArticlepeer-review

    44 Citations (Scopus)

    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 languageEnglish
    Pages (from-to)1634-1639
    Number of pages6
    JournalJournal of the American Ceramic Society
    Volume95
    Issue number5
    DOIs
    Publication statusPublished - 2012 May

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry

    Fingerprint

    Dive into the research topics of 'Effects of crystallization atmospheres on the near-infrared absorbtion and electroconductive properties of tungsten bronze type M <sub>x</sub> W O <sub>3</sub> (M = Na, K)'. Together they form a unique fingerprint.

    Cite this