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首页> 外文期刊>Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion >Optical properties and thermal stability of Cu spinel oxide nanoparticle solar absorber coatings
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Optical properties and thermal stability of Cu spinel oxide nanoparticle solar absorber coatings

机译：Cu尖晶石氧化物纳米粒子太阳能吸收涂层的光学性质和热稳定性

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摘要

Optimal coatings on receivers for concentrated solar power plants (CSP) not only need to have high solar absorptance, but should also possess superior stability in air at elevated temperatures. For next-generation CSP plants, the surface temperature of the receivers is expected to exceed 750 degrees C. In this work, we systematically studied optical properties and long term thermal stability of solar absorbing coatings (SACs) made from various Cu(II) containing spinel oxide nanoparticles, including CuCr2O4, Cu0.5Cr1.1Mn1.4O4, CuFeMnO4, and compared these properties to those of the state-of-the-art Pyromark 2500 coating. The solar absorptance of each sample was measured after isothermal annealing at 800 degrees C in air for durations of 100, 300, 1000, and 2000 h. We found that porous Cu0.5Cr1.1Mn1.4O4 had the highest solar absorptance at 97.1% before the thermal annealing and remained the highest throughout thermal testing, remained at 97.2% after 2000 h, whereas Pyromark 2500 exhibited considerable degradation in solar absorptance, from 96.4% to 94.6%. We analyzed the chemical composition, microstructures, and particle sizes of all the samples before and after the thermal annealing and discussed their implications on optical properties and thermal stability.
机译：用于集中的太阳能发电厂（CSP）的接收器上的最佳涂层不仅需要具有高太阳能吸收率，而且还应该在高温下的空气中具有卓越的稳定性。对于下一代CSP植物，预计接收器的表面温度将超过750℃。在这项工作中，我们系统地研究了由含有各种Cu（II）制成的太阳能吸收涂层（SAC）的光学性能和长期热稳定性尖晶石氧化物纳米颗粒，包括CuCr2O4，Cu0.5CR1.1Mn1.4O4，Cufemno4，并将这些性质与最先进的Pyromark 2500涂层的涂层进行比较。在等温退火的情况下在800℃的空气中以100,300,1000和2000小时的空气中的等温退火后测量每个样品的太阳能吸收率。我们发现多孔CU0.5CR1.1MN1.4O4在热退火之前的97.1％下的最高太阳能吸收率并保持最高的热试验，在2000小时后保持在97.2％，而Pyromark 2500在太阳能吸收率下表现出相当大的降级， 96.4％至94.6％。在热退火之前和之后，我们分析了所有样品的化学成分，微观结构和颗粒尺寸，并讨论了它们对光学性质和热稳定性的影响。

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