Electroless (autocatalytic) nickel-cobalt thin films as solar control coatings

S. John; K. N. Srinivasan; M. Selvam; V. Anuradha; S. Rajendran

doi:10.1117/12.185381

9 September 1994 Electroless (autocatalytic) nickel-cobalt thin films as solar control coatings

S. John, K. N. Srinivasan, M. Selvam, V. Anuradha, S. Rajendran

Proceedings Volume 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII; (1994) https://doi.org/10.1117/12.185381
Event: Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, 1994, Freiburg, Germany

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.

Citation Download Citation

S. John, K. N. Srinivasan, M. Selvam, V. Anuradha, and S. Rajendran "Electroless (autocatalytic) nickel-cobalt thin films as solar control coatings", Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); https://doi.org/10.1117/12.185381

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