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新型纳米氧化钨的近红外吸收性能

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Abstract:

采用化学沉淀法制备纳米氧化钨粉体,并用氢氮混合气对其进行还原处理,分析了还原处理温度对氧化钨化学组成的影响,用X射线粉末衍射仪表征了纳米氧化钨粒子的晶相与化学组成,采用扫描电子显微镜观察了该粒子还原处理前后的晶相形貌,并测定了由该纳米颗粒还原前后制得的胶状液体从可见光到近红外波长范围内的吸收光谱和透过光谱。研究表明还原后的氧化钨纳米粒子对1400~1600nm和1900~2200nm波段的近红外光具有显著的吸收增强效应,同时对可见光具有很高的透过性,这种具有特殊光学吸收特性的纳米氧化钨可望在新型太阳能热屏蔽器件的设计中得到应用

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