1. Aqueous solution-derived CuMn2O4 ceramic films for spectrally selective solar absorbers.
- Author
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Ma, Pengjun, Geng, Qingfen, Gao, Xianghu, Zhou, Tianhong, Yang, Shengrong, and Liu, Gang
- Subjects
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AQUEOUS solutions , *COPPER alloys , *SOLAR absorber-convertors , *SOLVENTS , *CHEMICAL precursors - Abstract
By replacing absolute ethanol, water was used as a ubiquitous and low-cost solvent to dissolve metal nitrates and organic additives to obtain a precursor solution that showed long-term stability and reproducibility. This precursor solution was used to deposit a CuMn 2 O 4 ceramic film on a stainless steel substrate using the convenient and inexpensive sol-gel dip-coating technique. The X-ray diffraction (XRD) profile of the ceramic film annealed for 1 h at 450 °C was found to coincide with that of crystalline CuMn 2 O 4 in the JCPDS database. The CuMn 2 O 4 ceramic film obtained at an annealing temperature of 500 °C exhibited excellent solar absorptance ( α s =0.905) and thermal emittance ( ε 100 =0.120). By optimizing the deposition parameters, we systematically investigated the effect of the chemical components, surface texture, and thickness of the ceramic film on its optical properties. Subjected to a thermal stability test at 252 °C, the CuMn 2 O 4 ceramic film showed good thermal stability with performance criterion (PC) values below 0.05. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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