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Thermochromic Property of Tungsten Doped VO2 Prepared by Hydrothermal Method

수열합성법으로 제조된 텅스텐이 도핑된 VO2의 열변색 특성

  • An, Ba Ryong (Department of Industrial & Applied Chemistry, Pukyong National University) ;
  • Lee, Gun-Dae (Department of Industrial & Applied Chemistry, Pukyong National University) ;
  • Son, Dae Hee (R&D Center, CFC Teramate Co.) ;
  • Lee, Seung Ho (Eco-Composite Materials Center, Korea Institute of Ceramic Engineering & Technology) ;
  • Park, Seong Soo (Department of Industrial & Applied Chemistry, Pukyong National University)
  • 안바룡 (부경대학교 공업화학과) ;
  • 이근대 (부경대학교 공업화학과) ;
  • 손대희 (씨에프씨 테라메이트) ;
  • 이승호 (한국세라믹기술원 에코복합소재센터) ;
  • 박성수 (부경대학교 공업화학과)
  • Received : 2013.06.19
  • Accepted : 2013.09.10
  • Published : 2013.12.10

Abstract

Vanadium oxide ($VO_2$) and tungsten-doped vanadium oxide (W-$VO_2$) powder, well known as thermochromic materials, were prepared from vanadium pentoxide ($V_2O_5$) and oxalic acid dihydrate by hydrothermal and calcination process. The crystal structure and thermochromic property of samples were analyzed using FE-SEM, XRD, XPS, DSC, and UV-Vis-NIR spectroscopy. With increasing the doping amount of W, the phase transition temperature of W-$VO_2$ sample decreased from $70^{\circ}C$ to $42^{\circ}C$. When heating W-$VO_2$ sample above the phase transition temperature, the UV-Vis-NIR spectrum was not changed in the visible range and shifted towards a low transparency in the full name (NIR) region.

Acknowledgement

Supported by : 교육과학기술부

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