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Incorporation of spherical shaped CuO@SiO 2 light microtraps into CuCoMnO x spinels to enhance solar absorbance
Author(s) -
Kordas George
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16851
Subject(s) - materials science , spinel , copper , absorbance , anodizing , absorptance , aluminium , substrate (aquarium) , analytical chemistry (journal) , wavelength , chemical engineering , optics , optoelectronics , composite material , metallurgy , chemistry , reflectivity , oceanography , physics , chromatography , geology , engineering
CuCoMnO x spinels were fabricated onto aluminum substrates via sol‐gel processing. The aluminum substrates were anodized to produce rough substrate surface, so to achieve diffuse reflection of incoming light. First, hollow copper nanospheres CuO particles have been produced with a size of 715 ± 15 nm. The copper oxide nanospheres were coated with SiO 2 yielding to a total diameter of 980 ± 30 nm comparable to the wavelength of FIR light. The resulting materials were characterized structurally and morphologically. The coatings were assessed with respect to absorptance α sol and emittance ε T behavior, determining the α/ε ratio. In case of CuO@SiO 2 microspheres incorporation into CuCoMnO x spinel coatings, the α / ε ratio reached the value α / ε of 30. The light trapping/scattering effect of CuO@SiO 2 microspheres incorporation was demonstrated by the variation of the concentration up to 1 wt% and determination of α/ε ratio. Based on these measurements, the α/ε ratio increases linearly with increasing CuO@SiO 2 microspheres concentration.