Spray-deposited black nickel selective absorber surfaces for solar thermal conversion

M. Madhusudana and H.K. Sehgal

Applied Energy, 1982, vol. 10, issue 1, 65-74

Abstract: A low cost, single-step process employing spray pyrolysis has been developed to deposit selective black nickel coatings on commercially available aluminium and galvanised iron substrates. Parameters for growth have been optimised by a comparative study of the structural, opto-thermal and optical properties of these films. Optimised films of black nickel on aluminium (~ 2300 Å) have [alpha] = 0·92 and [epsilon]100°C = 0·14 whereas those (~ 2500 Å) on galvanised iron have [alpha] = 0·90 and [epsilon]100°C = 0·13. The films are seen to be extremely adherent to the substrates and to have stable operational characteristics under temperature cycling up to 280°C in low humidity environments.

Date: 1982
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