Using this property, it can be observed that VO 2 possesses excellent potential for a wide range of applications, including optic switches, energy-efficient smart windows, and infrared camouflage purposes. The MIT of VO 2 displays a significant change in its infrared optical property, which means that VO 2 (M) can be transparent to infrared solar irradiation, and that VO 2 (R) has an adverse effect on infrared irradiation at a temperature higher than τ c. VO 2 is the most common thermal-induced metal–insulator transition (MIT) material, which is characterized by a subtle and reversible structural transformation from VO 2 (M) to VO 2 (R) at the critical temperature (τ c) of ~68 ☌ (“M” and “R” are abbreviations for monoclinic and rutile, respectively). Meanwhile, the polyester base coating on the fabric had an emissivity change of up to 22%, which provides a solution for adaptive IR camouflage. The VO 2 coating had good thermochromic performance the infrared transmittance change was greater than 20% μm whilst keeping the visible transmittance greater than 50%. To prepare VO 2 films, screen printing was performed with a stainless steel screen mesh mask on glasses or fabric substrate. The obtained VO 2 nanorods were thoroughly mixed with fluorocarbon resin and homogeneous emulsifier in an ethanol solution to obtain a VO 2 dispersion. The phase evolution of VO 2 during the hydrothermal process was studied. In this study, we developed a cost-effective and facile method for preparing VO 2 nanorods with a highly crystalline monoclinic phase by one-step hydrothermal synthesis, in which only V 2O 5 and H 2C 2O 4 are used as raw materials. VO 2 exhibits numerous polymorphs and thus it is essential to control the growth of specific monoclinic VO 2 (M) and rutile VO 2 (R) phases.
Vanadium dioxide (VO 2) has attracted interest from researchers because it undergoes a metal–insulator phase transition (MIT), which is accompanied by a reversible and remarkable change in both electrical and optical properties.
0 kommentar(er)
