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中文摘要：
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。
英文摘要：
A nano-powder of tungstate oxide was firstly prepared by a chemical precipitation process, and then the powder was reduced in H2/N2 gases at a high temperature. The phase and chemical composition of tungstate oxide before and after reduction were investigated by X-ray powder diffraction. The morphology of tungstate oxide before and after reduction was observed by scanning electron microscope. The absorption and transmittance spectra of tungstate oxide in a sol state from visible to near infrared wavelength were determined. The results indicated that the tungstate oxide after reduction had a high absorbance in 1 400-1 600 nm and 1 900-2 200 nm wave band for near infrared light and a high transmittance for visible light. It is suggested that the nano-powder of tungstate oxide with the special absorbing characteristics may be promising to be applied in the design for novel solar heat shielding.
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