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Preparation and Characterization of Co-CuCoMnOsub.x Solar Selective Absorption Coatings
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Preparation and Characterization of Co-CuCoMnOsub.x Solar Selective Absorption Coatings
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Journal Article
Preparation and Characterization of Co-CuCoMnOsub.x Solar Selective Absorption Coatings
2025
Overview
The Co-CuCoMnO[sub.x] coatings with varying proportions were prepared and investigated to develop a novel metal–ceramic solar selective absorption coating employed at high temperature. The CuCoMnO[sub.x] powders were synthesized using the solid-phase reaction method. Subsequently, Co-CuCoMnO[sub.x] coatings were deposited on the surface of 316L steels utilizing the atmospheric plasma spraying (APS) technique. The results showed that the synthesized CuCoMnO[sub.x] powders were mainly composed of two phases, which were Cu[sub.1.5]Mn[sub.1.5]O[sub.4] and MnCo[sub.2]O[sub.4]. The CuCoMnO[sub.x] powders had a solar absorptance of 0.929 and an infrared emittance of 0.862, which was considered a good solar absorbent. The synthesized Co-CuCoMnO[sub.x] coating had a typical thermal spray layered stacking structure. The chemical phases of the coatings were mainly Co, CoO, and CoCuMnO[sub.x]. Due to the addition of CuCoMnO[sub.x] inhibiting the oxidation of Co during the thermal spraying process, the 95Co-5CuCoMnO[sub.x] (wt%) coating exhibited the optimal quality factor (α/ε) of 2.184, with a solar absorptance α of 0.808 and an infrared emittance ε of 0.370, respectively. Moreover, this specific coating demonstrated a good thermal stability for up to 3 h when exposed to an atmospheric environment at 450 °C. The results indicate its significant potential for high-temperature solar selective absorption coating.
Publisher
MDPI AG
Subject
