Showing papers by "Claes-Göran Granqvist published in 1979"
01 Jan 1979
176 citations
TL;DR: In this paper, a detailed structural model of a thin layer comprising a mixture of Ni and Al2O3 located near the bottom of the anodic film was proposed. But the model was not applied to the metal insulator layer, which was described with the Bruggeman effective medium theory.
Abstract: Ni pigmentation of anodic Al2O3 is obtained by electrolytic coloration. Durable coatings with good spectral selectivity (a/e≃8) are produced. Scanning electron microscopy, Auger depth profiling, and atomic absorption analysis lead to the formulation of a detailed structural model, its most essential feature being a thin layer comprising a mixture of Ni and Al2O3 located near the bottom of the anodic film. Experimental spectral reflectance data agree well with computer calculations, provided the optical properties of the metal‐insulator layer are described with the Bruggeman effective medium theory.
60 citations
TL;DR: In this paper, the optical transmittance of such coatings was recorded, provided that proper regard was given to the occurence of sulfide pellicles and to the aggregated nature of the deposits.
26 citations
TL;DR: A plot of the superconducting transition temperature against the number of films yields a zig-zag variation superimposed on a smoothly increasing curve as discussed by the authors, which agrees qualitatively with a recent theory for electron correlation.
11 citations
TL;DR: In this paper, the authors present results of model calculations performed with the purpose of elucidating the parameters which govern the selectivity of solar energy absorption with ultrafine chromium particles on reflecting substrate.
7 citations