碳热还原法制备VO_2/云母复合粉体研究  

Preparation of VO_2/Mica composite powder by carbothermal method

作　　者：蔡靖涵[1] 黄婉霞[1] 何鹏[1] 罗蓉蓉[1] 颜家振[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610064

出　　处：《功能材料》2011年第B02期82-84,共3页Journal of Functional Materials

基　　金：四川省科技支撑资助项目(2008GZ0184)

摘　　要：首先采用溶胶-凝胶法和喷雾干燥法在云母微粉表面包覆V2O5,然后与炭黑混合均匀,通过高温退火还原获得VO2/云母复合粉体。利用XRD、SEM、FT-IR等手段对其进行表征,结果表明,碳热还原法制备的VO2/云母复合粉体相变温度为68℃,滞后温宽为16℃,在波长λ=4.55μm(波数=2200cm-1)的红外光波段,加入5%VO2/云母复合粉体的薄膜相变前后透过率变化为26%。Vanadium pentoxide were coated on Mica by sot-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.

关 键 词：碳热还原 VO2/云母 粉体 红外透过率 

分 类 号：TQ135.1[化学工程—无机化工]