钨掺杂二氧化钒粉体的制备和热致变色性能  

Preparation and Thermochromic Property of Tungsten-Doped Vanadium Dioxide Particles

作　　者：施剑秋[1] 顾广新[1] 游波[1] 周树学[1] 

机构地区：[1]复旦大学材料科学系教育部先进涂料工程研究中心,上海200433

出　　处：《复旦学报（自然科学版）》2007年第3期360-365,共6页Journal of Fudan University：Natural Science

基　　金：2005年度世博科技专项资助项目(05DZ05845)

摘　　要：通过水解硫酸氧钒并在N2保护下573-1073 K煅烧水解产物得到二氧化钒粉体,掺入钨酸盐与硫酸氧钒共水解可得到钨掺杂二氧化钒,将二氧化钒与树脂共混制备了复合涂层.运用正交实验优化了煅烧条件,并用DTA,TG,XRD,XPS,XRF,DSC,Vis-NIR光谱等方法进行了表征.表征和研究结果证明：粉体为均一的单斜相,符合二氧化钒的化学组成比（VOx,x=2）;钨酸钠加入量与掺钨量成正比;二氧化钒的金属半导体相变温度可通过掺钨降低至室温或更低;相变性能也与研磨分散时间相关;钨掺杂二氧化钒粉体共混涂层在室温下能够显示出热致变色性能.Tungsten-doped VO2 partides were successfully synthesized by hydrolysis of VOSO4 mingled with Na2WO4 and subsequent caldnation at 573-1 073 K under N2, the coating was obtained by blending VO2 particles with acrylic resin. An orthogonal experiment was designed to optimize calcinating conditions. And DTA, TG, XRD, XPS, XRF, I）SC, VisNIR spectra were employed to characterize the properties of VO2 particles and coatings. The results proved that VO2 particles had monoclinic structure and stoichiometric composition. The critical phase transition temperature of VO2 particles could be reduced to room temperature by increasing the dopant content in VO2, which was easily controlled by the concentration of NazWO4. The phase transition property was also dependent on grinding time. The VO2 embedded coating had therrnochromic performance caused by phase transition property of VO2 particles.

关 键 词：二氧化钒 金属-半导体相变 掺杂 涂层 热致变色 

分 类 号：TQ630.1[化学工程—精细化工]