Preparation of VO_2/Mica composite powder by carbothermal method

Vanadium pentoxide were coated on Mica by sol-gel and spray drying method,grinded with carbon black,and then the VO2/Mica composite powder were obtained by high temperature carbothermal annealing.The characteristics of the VO2/Mica composite powder were analysed by XRD,SEM and FT-IR.The results suggested that the thermochromic VO2/Mica composite powder prepared by carbothermal method have phase transition temperature of 68℃,hysteresis width of 10℃,and the change rate of infrared transmittance between the phase transition reaches 26% at the wavenumber of 2200cm-1.