| Numéro |
J. Phys. Colloques
Volume 42, Numéro C1, Janvier 1981
Conférence Internationale sur les Matériaux pour la Conversion Photothermique de l'Energie Solaire
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|---|---|---|
| Page(s) | C1-317 - C1-326 | |
| DOI | https://doi.org/10.1051/jphyscol:1981122 | |
Conférence Internationale sur les Matériaux pour la Conversion Photothermique de l'Energie Solaire
J. Phys. Colloques 42 (1981) C1-317-C1-326
DOI: 10.1051/jphyscol:1981122
Physics Institute, UNICAMP, 13100 - Campinas, Brazil
J. Phys. Colloques 42 (1981) C1-317-C1-326
DOI: 10.1051/jphyscol:1981122
THIN FILMS OF GAS-EVAPORATED Co FOR USE IN PHOTOTHERMAL CONVERSION
M.C.A. Fantini, J.R. Moro et M. AbramovichPhysics Institute, UNICAMP, 13100 - Campinas, Brazil
Abstract
Selective surfaces for an efficient solar energy photothermal conversion were obtained by evaporation of Co in a gaseous atmosphere. A bell jar system was used with a Tungsten basket and a gas mixture consisting of oxygen and helium. Using a KBr substrate we performed spectral measurements of the transmittance from 0.38 µm to 20 µm obtaining λc ≈ 2.5 µm. The film observed in a transmission electron microscope revealed a small particles structure for which the filling factor was measured. The results justified the application of the Maxwell Garnett theory.