CuS/FeCuMnCoOx太阳能选择性吸收涂层的制备与性能研究

以沉淀烧结法合成 FeCuMnCoO_x粉体，以模板法合成 CuS@Cu₂O复合粉体；采用自制有机硅树脂为粘合剂，以上述粉体为功能填料制备太阳能吸收涂层。采用 XRD和 SEM表征粉体的成分与结构，分别采用紫外可见近红外分光光度计及红外光谱仪测定涂层在 200~2 000 nm和 3 000~2 5 000 nm（中远红外）的光谱反射率，并根据测得的光谱反射率计算涂层太阳能吸收率和发射率。研究 FeCuMnCoO_x粉体中 Co的物相与含量对涂层光谱反射率的影响， FeCuMnCoO_x粉体与 CuS@Cu₂O的配比对涂层太阳能吸收率、发射率及品质因子的影响。结果表明： FeCuMnCoO_x粉体的物相包括（Co，Mn）（Co，Mn）₂O₄、CoFeMnO₄、CuFeMnO₄和 Cu_1.5Mn_1.5O₄。随着 Cu_1.5Mn_1.5O₄和 CuFeMnO₄相的增加， FeCuMnCoO_x -有机硅涂层在 300~1 400 nm的反射率降低，太阳能吸收率（ α_sol）由 92.6%提升至 93.8%。合成的 CuS包覆在规则二十六面体 Cu₂O表面，其粒径为 50~200 nm，光谱反射率（ 200~2 000 nm）低于市售 CuS，不同 CuS/FeCuMnCoO_x复合粉体配比的涂层太阳能吸收率在 91.8%~94.5%，发射率在 17.8%~21.1%。当 m（CuS）∶m（FeCuMnCoO_x）=1∶5时，太阳能吸收率 α_sol=94.5%，发射率 ε_298K=18.2%，品质因子（ α_sol/ε_298K）=5.19，太阳能选择性吸收涂层性能达到最佳。

Preparation and Properties of CuS/FeCuMnCoO_x Based Solar Selective Absorption Coatings

The FeCuMnCoOx powder was synthesized by precipitation and sintering process,and the CuS@Cu2O composite powder was prepared by template method. The solar absorption coatings was prepared by using the home-made silicone resin as the binder and the above powders as the functional fillers. XRD and SEM were used to characterize the composition and structure of the powders. The spectral reflectance of the coatings at 200-2 000 nm and 3 000-25 000 nm(mid-far infrared)was measured by UV-visible near-infrared spectrophotometer and infrared spectrometer,respectively. Ther solar absorptivity and emissivity of the coatings was calculated based on the obtained spectral reflectance. The effects of the phase and content of Co in FeCuMnCoOx powder on the spectral reflectance of the coatings,the effects of the ratio of FeCuMnCoOx powder and Cu S@Cu2O on the solar absorptivity,emissivity and quality factor of the coatings were studied. The results showed that the phase of FeCuMnCoOx powder included(Co,Mn)(Co,Mn)2O4,CoFeMnO4,CuFeMnO4 and Cu1. 5Mn1. 5O4. With the increase of Cu1. 5Mn1. 5O4 and CuFeMnO4 phases,the reflectivity of FeCuMnCoOx-silicone coatings decreased at 300-1 400 nm,and the solar absorption rate (αsol) increased from92. 6%to 93. 8%. The synthesized CuS was coated on the surface of regular hexahedral Cu2O,its particle size was 50-300 nm,the spectral reflectance(200-2 000 nm)was lower than that of commercially available CuS,and the coatings with different CuS/FeCuMnCoOx ratios have a solar absorption rate of 91. 8%-94. 5%,and an emissivity of 17. 8%-21. 1%. When the mass ratio of CuS∶FeCuMnCoOx =1∶5,the performance of solar selective absorbing coatings was the best,the solar absorption rate αsol=94. 5%,the emissivity ε298K=18. 2%,and the quality factor (αsol/ε298K)=5. 19.