Aqueous solution-derived CuMn2O4 ceramic films for spectrally selective solar absorbers. Issue 16 (December 2016)

• Record Type: Journal Article
• Authors: Ma, Pengjun; Geng, Qingfen; Gao, Xianghu; Zhou, Tianhong; Yang, Shengrong; Liu, Gang
• Is Part Of: Ceramics international. Volume 42:Issue 16(2016)
• Page Start: 19047
• Page End: 19057
• Publication Date: 2016-12
• Subjects: CuMn2O4 spinel ceramic film -- Sol-gel dip-coating -- Surface structure -- Optical property -- Thermal stability; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.09.062
• Languages: English
• ISSNs: 0272-8842

Abstract

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 CuMn2 O4 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 CuMn2 O4 in the JCPDS database. The CuMn2 O4 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 CuMn2 O4 ceramic film showed good thermal stability with performance criterion (PC) values below 0.05.