Miran, H.A., Rahman, M.M., Jiang, Z-T, Altarawneh, M., Chuah, L.S., Lee, H-L, Mohammadpour, E., Amri, A., Mondinos, N. and Dlugogorski, B.Z.
الملخص الانجليزي
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.
تاريخ النشر
15/04/2017
الناشر
ELSEVIER
رقم المجلد
701
رقم العدد
ISSN/ISBN
0925-8388
رابط DOI
https://doi.org/10.1016/j.jallcom.2017.01.079
الصفحات
14
الكلمات المفتاحية
Solar selectivity Copper cobalt oxides, Density functional theory, Solar selective surface, Annealing temperature, Bader charges analysis
حسين علي جان ميران | Hussein Ali Jan Miran | 2979