W-Doped VO₂ (M) with Tunable Phase Transition Temperature

Abstract:

W-doped VO₂ (B) nanoneedles were successfully synthesized by solgel combing with hydrothermal treatment, in which the polyethylene glycol (PEG) was used as both surfactant and reducing. The metastable VO₂ (B) was completely transformed to thermochromic VO₂ (M) after annealing at high purity N₂ atmosphere. The DSC results exhibit a strong crystallographic transition, and the phase transition temperature of VO₂ (M) can be reduced to about 38 °C by W-doping. Field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM) were used to characterize the morphology and crystalline structure of the samples. The variable-temperature infrared transmittance spectra of VO₂ (M) demonstrate their potential applications in energy saving field.

• Periodical: Applied Mechanics and Materials (Volume 320)
• Pages: 483-487
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.320.483
• Online since: May 2013
• Authors: Ming Li, Deng Bing Li, Jing Pan, Guang Hai Li
• Keywords: Energy Saving, Nanoneedles, W-Doped

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