Showing papers by "Claes-Göran Granqvist published in 1980"
TL;DR: In this paper, a multilayer model was formulated, its most conspicuous feature being a sheath near to the Al interface comprised of metallic Ni particles in an Al2O3 matrix.
Abstract: Spectrally selective surfaces on Al metal sheets were prepared by dc anodization in dilute phosphoric acid followed by black coloration via ac electrolysis in a bath containing NiSO4. These coatings had good durability, as found from several accelerated tests. The optical performance was studied by the recording of hemispherical reflectance or specular reflectance in conjunction with diffuse light scattering. From these results we extracted a solar absorptance of 0.93–0.96 and a corresponding thermal emittance of 0.10–0.20. The structure of the coatings was investigated by scanning electron microscopy on fractured specimens, Auger electron spectroscopy combined with depth profiling by sputtering, and atomic absorption analysis. Based on this information, a multilayer model was formulated, its most conspicuous feature being a sheath near to the Al interface comprised of metallic Ni particles in an Al2O3 matrix. The optical properties of this layer were described either by the Maxwell Garnett theory or the ...
177 citations
TL;DR: The dielectric function epsilon identical with ePSilon(1) + iepsilon(2) of evaporated SiO films is reported for the wavelength region from 8 to 33 microm.
Abstract: The dielectric function e ≡ e1 + ie2 of evaporated SiO films is reported for the wavelength region from 8 to 33 μm The data are based on spectrophotometric measurements of reflectance and transmittance for films evaporated onto KRS-5 and crystalline Si and on reflectance measurements on films evaporated onto opaque Al layers The consistency in the results for e and e2 is verified by the Kramers-Kronig analysis
32 citations