Structural and optical characteristics of pre- and post-annealed sol-gel derived CoCu-oxide coatings

H.A. Miran; M.M. Rahman; Z-T Jiang; M. Altarawneh; L.S. Chuah; H-L Lee; E. Mohammadpour; A. Amri; N. Mondinos; B.Z. Dlugogorski

doi:10.1016/j.jallcom.2017.01.079

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Structural and optical characteristics of pre- and post-annealed sol-gel derived CoCu-oxide coatings

Journal article

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Structural and optical characteristics of pre- and post-annealed sol-gel derived CoCu-oxide coatings

H.A. Miran, M.M. Rahman, Z-T Jiang, M. Altarawneh, L.S. Chuah, H-L Lee, E. Mohammadpour, A. Amri, N. Mondinos and B.Z. Dlugogorski

Journal of Alloys and Compounds, Vol.701, pp.222-235

2017

DOI: https://doi.org/10.1016/j.jallcom.2017.01.079

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Abstract

Sol-gel derived CuCo-oxide coatings as solar selective surfaces, synthesized onto aluminium substrates at various annealing temperatures, are analysed by correlating their structural, chemical bonding states, and surface morphological topographies. As the annealing progressed, all the coatings displayed a Cu0.56Co2.44O4 (ICSD 78-2175) phase with preferential orientation along (400) reflection plane. Rietveld refinement of X-ray diffraction (XRD) data indicate that residual stress and microstrains developed around the coating surfaces are reduced resulting in mechanically stable thin films. Enhancement of the crystallite size and preferred orientation of the surface were confirmed via XRD, field emission scanning electron microscopy (FESEM), and atomic force microscopy (AFM) analysis. X-ray photoelectron spectroscopy (XPS) analysis shows tetrahedral, octahedral and mixed states of Cu and Co ions with a stable atomic ratio of Co/Cu, and an increase of O and C contents but no metal-carbon bonding on the surface of materials. Optical reflectance investigations indicated that solar selectivity of the coatings increased from 3.81 to 24 as the annealing temperature reached up to 500 °C.

Details

Title: Structural and optical characteristics of pre- and post-annealed sol-gel derived CoCu-oxide coatings
Authors/Creators: H.A. Miran (Author/Creator) - University of Baghdad
M.M. Rahman (Author/Creator) - Murdoch University
Z-T Jiang (Author/Creator) - Murdoch University
M. Altarawneh (Author/Creator) - Murdoch University
L.S. Chuah (Author/Creator) - Universiti Sains Malaysia
H-L Lee (Author/Creator) - Universiti Sains Malaysia
E. Mohammadpour (Author/Creator)
A. Amri (Author/Creator) - Riau University
N. Mondinos (Author/Creator) - Murdoch University
B.Z. Dlugogorski (Author/Creator) - Murdoch University
Publication Details: Journal of Alloys and Compounds, Vol.701, pp.222-235
Publisher: Elsevier
Identifiers: 991005540225407891
Copyright: © 2017 Elsevier B.V.
Murdoch Affiliation: School of Engineering and Information Technology
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 7 Engineering & Materials Science; 7.70 Thermodynamics; 7.70.1160 Solar Thermal Systems
Web Of Science research areas: Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
ESI research areas: Materials Science