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25 November 1992 Cobalt-cadmium solar selective black coating
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This paper describes the development of electro-deposited selective cobalt-cadmium coating for solar thermal energy conversion. Electrolyte composition and operating conditions were standardized by the use of Hull Cell. Ammonium thiocyanate has been used as a complexing agent to produce quality black coating with good optical properties. Cetyl trimethyl ammonium bromide (CTAB) has been used as an addition agent to improve the physical properties of the deposit. The present system has been studied in the current density range 1.6 to 8 A/dm2. Solar absorptance ((alpha) ) of 0.94 and thermal emittance ((epsilon) ) of 0.1 were achieved. A thermal cycling test was also carried out. It showed decrease in the thermal emittance ((epsilon) ) and increase in the solar absorptance ((alpha) ) and thereby shows its ability for use in high temperature solar thermal energy conversion systems.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. John and S. Santhi "Cobalt-cadmium solar selective black coating", Proc. SPIE 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows, (25 November 1992);

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