Cs Doped Tungsten Oxide Nanoparticles Applied for Nano-ceramic Color Master

Cs doped tungsten oxide nanoparticles, which are also called cesium tungsten oxide (CsxWO3) nanoparticles, may be used for preparing nano-ceramic color master. And the prepared color master is mainly applied to produce heat insulation film. According to the experts, CsxWO3 nanoparticles can be synthesized by solvothermal reactions using ethanol and 57.1 vol% ethanol aqueous solution at 200 °C for 12 h.

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The experts also investigated the effects of post annealing in ammonia atmosphere on the microstructure and electrical–optical properties. Agglomerated particles consisting of disk-like nanoparticles and nanorods of CsxWO3 were formed in the pure ethanol and ethanol aqueous solutions, respectively. The samples retained the original morphology and crystallinity after annealing in ammonia atmosphere up to 500 °C, while a small amount of nitrogen ion were incorporated in the lattice. The as-prepared Cs doped tungsten oxide nanoparticles showed excellent near infrared (NIR) light shielding ability as well as high transparency in the visible light region. The electrical resistivity of the pressed pellets of the powders prepared in pure ethanol and 57.1 vol% ethanol aqueous solution greatly decreased after ammonia annealing at 500 °C.

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