【摘要】 二氧化钒(VO2)是一种热致可逆相变氧化物,在约68℃时发生由半导体态向金属态的一级位移型相变,同时伴随着显著的电学、磁学、光学特性的变化,且相变温度可通过掺杂调节。制备了二氧化钒粉体和薄膜材料,分别研究了两种材料的热致红外发射率变化特性;采用热像仪拍摄了二氧化钒涂层和薄膜不同温度的红外热图,探讨了其在隐身技术中的应用。结果表明:二氧化钒涂层和薄膜在相变前后具有主动控制自身辐射强度的特性,在红外自适应隐身技术中具有一定的应用前景。更多还原

【Abstract】 Thermochromic vanadium dioxide(VO2) exhibits a semi-conduction to metallic phase transition at about 68 ℃,involving strong variations in electrical,magnetic and optical properties.Besides,the phase transition temperature of VO2 can be changed by doping.Thin films and powder of VO2 were prepared respectively,and their infrared thermochromic properties were also studied.Thermal images of VO2 thin films and VO2 coatings under different temperatures were derived by infrared camera,and the applications of VO2 in infared stealth technology were discussed.The results show that VO2 thin films and VO2 coatings can control their infrared radiant intensity actively,and have great application prospects in the field of adaptive infrared stealth technology.更多还原