Abstract Simple technological process, low cost and high stability are important for large-scale production of the high temperature spectral selective solar absorber coatings. In this study, a simple Mo-HfC/Al2O3 coating that only contains an absorber layer (Mo-HfC) and an antireflection layer (Al2O3) deposited onto stainless steel substrate, which exhibits a high spectral selectivity (αs/eT) of 0.92/0.11. The experimental results indicate that the addition of Mo could greatly enhance the spectral selectivity of the coating. Thermal stability test demonstrates that the spectral selectivity of the coating remains unchanged even after annealed it at 600°C for 100 h in vacuum. Obviously, the coating shows a promising prospect in high temperature application. In addition, the optical degradation mechanism is also discussed in this work.

中文翻译：

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添加 Mo 提高 HfC 基高温太阳能吸收剂的光谱选择性

摘要 工艺简单、成本低、稳定性好是高温光谱选择性太阳能吸收涂层的规模化生产的关键。在这项研究中，一个简单的 Mo-HfC/Al2O3 涂层只包含一个吸收层 (Mo-HfC) 和一个抗反射层 (Al2O3) 沉积在不锈钢基板上，表现出 0.92/的高光谱选择性 (αs/eT) 0.11。实验结果表明，Mo的加入可以大大提高涂层的光谱选择性。热稳定性测试表明，即使在真空中 600°C 退火 100 小时后，涂层的光谱选择性仍保持不变。显然，该涂层在高温应用中显示出广阔的前景。此外，本文还讨论了光学退化机制。