Properties of spray-deposited cobalt oxide selective coatings on aluminium and galvanised iron substrates

C. Choudhury and H.K. Sehgal

Applied Energy, 1982, vol. 10, issue 4, 313-324

Abstract: Highly stable selective coatings of cobalt oxide have been prepared on commercial aluminium and galvanised iron substrates by the method of spray pyrolysis. The optothermal, structural and optical properties of these films have been investigated to determine the optimum growth parameters. Best selectivity values are obtained for films with thicknesses ~0·30 [mu]m on aluminium and ~0·32 [mu]m on galvanised iron. The optimised films on aluminium give [alpha] = 0·88 and [epsilon]100°C = 0·15 whereas those on galvanised iron give [alpha] = 0·88 and [epsilon]100°C = 0·13. The films are extremely adherent and are stable up to 500°C in the case of aluminium and 350°C in the case of galvanised iron substrates.

Date: 1982
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