纳米锑掺杂二氧化锡(ATO)水凝胶的水热法制备以及ATO导电薄膜的透明和隔热性能

摘要

A wet gel of antimony-doped tin dioxide(ATO)was prepared by acetate co-precipitation route.The obtained ATO wet gel was adopted as the precursor to afford an ATO hydrogel via hydrother-mal reaction at a certain temperature.The effects of the washing degree of the precursor,the hydrother-mal reaction temperature and pH as well as the calcination temperature on the electric conductivity of the ATO hydrogel were investigated.Furthermore, the ATO hydrogel obtained under acidic condition was made into conductive film, and the transparency and heat-insulating performance of the as-pre-pared ATO conductive film were investigated.It indicates that the washing degree of the precursor has little effect on the electric conductivity of the ATO hydrogel,and the electric conductivity of the ATO hydrogel can be improved with elevating hydrothermal reaction temperature.After being calcined at 600℃,the resultant ATO hydrogel exhibits a resistivity of 0.8 Ω· cm.Furthermore,the ATO conductive film has a visible light transmittance of as much as 85%and an infrared absorbance rate of 53%,show-ing excellent transparency and heat-insulation performance.%以醋酸盐共沉淀法制备了锑掺杂二氧化锡(ATO)湿凝胶;将其作为前驱体,在一定温度下经水热法得到ATO水凝胶.考察了前驱体洗涤程度,水热反应温度、pH以及煅烧温度对ATO水凝胶导电性能的影响.进而将酸性条件下得到的ATO水凝胶制备成导电薄膜,考察了其透明和隔热性能.结果表明:前驱体洗涤程度对ATO水凝胶导电性能的影响不大;随着水热反应温度的升高,水凝胶导电性能改善;当凝胶煅烧温度提高到600℃时,ATO样品的电阻率为0.8 Ω· cm.此外,ATO导电薄膜的可见光透过率达85%,红外光吸光率为53%,显示出优异的透明和隔热性能.