Nanocrystalline CsxWO3 particles: Effects of N 2 annealing on microstructure and near-infrared shielding characteristics

Jing Xiao Liu, Fei Shi, Xiao Li Dong, Qiang Xu, Shu Yin, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

In order to further improve the near-infrared shielding properties of cesium tungsten bronze (CsxWO3) for solar filter applications, CsxWO3 particles were prepared by solvothermal reaction method and the effects of nitrogen annealing on the microstructure and near-infrared shielding properties of CsxWO 3 were investigated. The obtained CsxWO3 samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and spectrophotometer. The results indicate that nanosheet-like Cs xWO3 particles with hexagonal structure began to transform into nanorods after annealed at temperature higher than 600 C. The near-infrared shielding properties of CsxWO3 particles could be further improved by N2 annealing at 500-700 C. Particularly, the 500 C-annealed CsxWO3 samples in the N2 atmosphere showed best near-infrared shielding properties. It was suggested that the excellent near-infrared shielding ability of the 500 C-annealed Cs xWO3 samples is correlated with its minimum O/W atomic ratio and most oxygen vacancies.

Original languageEnglish
Pages (from-to)182-187
Number of pages6
JournalMaterials Characterization
Volume84
DOIs
Publication statusPublished - 2013 Sep 9

Keywords

  • CsWO
  • Microstructure
  • N annealing
  • Near-infrared shielding
  • Solvothermal synthesis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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