| 초록 |
Monoclinic phase vanadium dioxide(VO2) takes place its phase reversibly into tetragonal phase at about 68℃. Because of the metal-insulator transition(MIT) characteristic of VO2, it has great application potentials such as temperature sensing devices and intelligent energy conserving windows coating. The transition temperature(Tc) can be adjusted by doping with W, Mo, Nb and etc. Previous studies on reducing Tc of VO2 have been investigated mainly as single W doped into VO2, but it reveals drastic changes of Tc. As an alternative, co-doping method could be possible for fine control of Tc. In this study, We prepared W-Mo co-doped VO2 particle using hydrolysis of VOSO4. From the XRD results, the crystallinity of W-Mo-VO2 with VO2(M) phase is stronger than W-VO2 itself. Tc can be precisely controlled by adding Mo to W-VO2 particle from DSC analysis. TEM analysis confirmed the W-Mo-VO2 has uniform morphology and narrow size distribution. For more information, FE-SEM, XPS studies have been carried out. |
