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Proceedings Paper

Electroless (autocatalytic) nickel-cobalt thin films as solar control coatings
Author(s): S. John; K. N. Srinivasan; M. Selvam; V. Anuradha; S. Rajendran
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Paper Abstract

This paper describes the deposition of nickel-cobalt-phosphorous coatings by the electroless deposition technique for use as solar control coatings in architectural glazing of buildings. Electroless deposition is characterized by the autocatalytic deposition of a metal/alloy from an aqueous solution of its ions by interaction with a chemical reducing agent. The reducing agent provides electrons for the metal ions to be neutralized. The reduction is initiated by the catalyzed surface of the substrate and continued by the self catalytic activity of the deposited metal/alloy as long as the substrate is immersed in the electroless bath and operating conditions are maintained. Electroless nickel-cobalt-phosphorous thin films were deposited from a solution containing 15 g/l nickel sulphate, 5 g/l cobalt sulphate, 60 g.l ammonium citrate and 25 g/l sodium hypophosphite operating at 30 degree(s)C, at a pH of 9.5 for two minutes. Electroless nickel-cobalt-phosphorous coatings are found to satisfy the basic requirements of solar control coatings. Autocatalytic deposition technique offers the possibilities of producing large area coatings with low capital investment, stability and good adhesion to glass substrates.

Paper Details

Date Published: 9 September 1994
PDF: 11 pages
Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); doi: 10.1117/12.185381
Show Author Affiliations
S. John, Central Electrochemical Research Institute (India)
K. N. Srinivasan, Central Electrochemical Research Institute (India)
M. Selvam, Central Electrochemical Research Institute (India)
V. Anuradha, Alagappa Univ. (India)
S. Rajendran, Alagappa Univ. (India)


Published in SPIE Proceedings Vol. 2255:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII
Volker Wittwer; Claes G. Granqvist; Carl M. Lampert, Editor(s)

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