SELECTIVE ABSORBERS AND EMITTERS OBTAINED ON ZINC SUBSTRATES BY AN ELECTROCHEMICAL PROCESS

Selective surfaces used in the photothermal conversion of solar energy and permitting to produce heat or cooling are obtained on zinc substr ates by an electrochemical process. Values of optical properties are o btained by an absorptiometer, an emissiometer and the Fourier Transfor m Infrared Spectroscopy (FTIR). The texture of these surfaces is analy zed by Scanning Electron Microscopy (SEM) and by measurements of elect rochemical impedance. The physical - chemical characterization is real ized by microanalysis of secondary X-rays and by Secondary Ion Mass Sp ectroscopy (SIMS).