本論文係有關Cu-Zn氧化物奈米粉體之製備與二氧化鈦被覆，以作為具高近紅外光反射特性之暗色顏料。不同Cu/Zn比例之Cu-Zn氧化物奈米粉體可藉由溶膠凝膠法及後續在400–700oC的熱處理製得。所得粉體以熱重分析來鑑定熱處理引發的相轉換，以穿透式電子顯微鏡(TEM)分析其大小與形態，並以X射線繞射(XRD)確認CuO與 ZnO兩相共存之事實。接著將粉體與環氧樹脂均勻混合製成複合膜，量測其近紅外光反射特性，探討Cu/Zn比例、熱處理溫度、及膜厚度對紫外光-可見光吸收及近紅外光反射特性的影響。結果顯示，厚度220μm、含10wt% Cu-Zn氧化物奈米粉體(在50 oC合成、600oC熱處理，Cu/Zn=1/19)之複合膜，在近紅外光有88%的反射率，且顏色維持為暗色。進一步在Cu-Zn氧化物奈米粉體表面被覆二氧化鈦，藉著調整二氧化鈦前驅物濃度及反應時間改善近紅外光反射特性。以XRD、TEM及X射線能量散佈(EDX)光譜鑑定最終產品之大小、型態、及組成。以高解析TEM(HRTEM)及界面電位計確認二氧化鈦在Cu-Zn氧化物奈米粉體表面之被覆。由紫外光-可見光吸收及近紅外光反射特性的量測，顯示二氧化鈦被覆之Cu-Zn氧化物奈米粉體可作為具高近紅外光反射特性之暗色顏料。

This thesis concerns about the preparation and titania coating of Cu–Zn oxide nanopowders as dark color pigments with high near infra-red (NIR) reflective property. Cu–Zn oxide nanopowders with various Cu/Zn ratios were prepared by sol-gel route and the followed annealing 400–700oC. Thermogravimetric measurement was used to identify the thermally-induced phase transformations. Their size and morphology were characterized by transmission electron microscopy (TEM), and the co-presence of CuO and ZnO phases was demonstrated by the analysis of X-ray diffraction (XRD) pattern. The resulting Cu–Zn oxide nanopowders were mixed homogeneously with epoxy resin and then casted into composite films for the measurement of NIR reflective property. The effects of Cu/Zn ratio, annealing temperature, and film thickness on the UV-Vis absorption and NIR reflection were studied. It was shown that the 220μm-thick composite film containing 10 wt% of Cu–Zn oxide nanopowders with the Cu/Zn ratio of 1/19 synthesized at 50oC and annealed at 600oC exhibited 88% of reflection in NIR region and maintained a dark color. Further titania coating was done to improve the NIR reflection property by varying the precursor concentration of titania and reaction time. The size, morphology and composition of final product were characterized by XRD, TEM, and energy dispersive X-ray (EDX) spectroscopy. High resolution TEM (HRTEM) and zeta potential analyses were carried out to confirm the presence of titania shells on the surface of Cu-Zn oxide nanopowders. From the measurements of UV-Vis absorption and NIR reflection, it was found that amorphous titania-coated Cu–Zn oxide nanopowders could be used as dark color pigment with high NIR reflective property.

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