Abstract
In this paper we describe the preparation of black zincated steel plates and zinc powders. Infrared reflection/absorption (6°, 78°), reflection (6°) and transmission spectroscopy have been used for identification of layers formed on the corresponding substrates. It was found that modification of the existing method proposed by Telkes is necessary in order to obtain zinc powder with sufficient solar absorptance. Colour strengths of the layers and powders formed have been correlated with the existence of various copper(I) and copper(II) oxides in the layers. A negative reflectance peak at 595 cm −1 has been detected in the reflectance spectrum of black zinc powder and its origine was attributed to the coupled ν CuO phonon mode with free electron oscillations of metallic zinc.
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