Proceedings of the 1986 International Congress on Renewable Energy Sources. Low-cost, durable black cobalt selective solar absorber surfaces. International Congress on Renewable Energy Sources [18-23 Mayo 1986, Madrid].

Consejo Superior de Investigaciones Científicas.
Hutchins, M.G. Wright, P.J. Grebenik, P.D.

1987

v. 2
1113
CIENA

84-00-6674-X

Spectrally selective black cobalt surfaces for use as solar absorber coatings have been prepared by chemical conversion and thermal oxidation processes respectively. The surfaces so formed exhibit excellent selective optical properties of high solar absorptance and low thermal emittance. The composition and microstructure of the surfaces have been studied in detail. The chemically converted surface is predominantly composed of cobaltic oxide hydroxide, CoO(OH), and the thermally oxidised surface is a mix of CoO and Co3O4. A study of the composition, microstructure and optical properties following exposure in air to elevated temperatures for extensive periods has been carried out.. ABSTRACT. INTRODUCTION. EXPERIMENTAL. Chemical conversion of cobalt metal. Thermal oxidation of cobalt metal. RESULTS. DISCUSSIONS. REFERENCES. ACKNOWLEDGEMENTS.

Presenta ilus. y gráfs.

GENERAL; ENERGIA SOLAR; SUPERFICIES SELECTIVAS; EXPERIMENTOS; CONVERSION DE LA ENERGIA;