Colouring Mechanism of Red Ceramic Pigments Based on Perovskite Structure

The origin of colour in Cr-doped ceramic pigments with AIIIBIIIO3 perovskite structure was investigated by high resolution X-ray diffraction and LTV-Vis-NIR spectroscopy. The development of red colour is related to different phenomena: symmetry lowering from hexagonal (Nd) to orthorhombic (Sm-Yb); c...

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Bibliographic Details
Published in:Key engineering materials 2004-01, Vol.264-268, p.1549-1552
Main Authors: Baldi, Giovanni, Cruciani, G., Matteucci, F., Dondi, M., Barzanti, A.
Format: Article
Language:English
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Summary:The origin of colour in Cr-doped ceramic pigments with AIIIBIIIO3 perovskite structure was investigated by high resolution X-ray diffraction and LTV-Vis-NIR spectroscopy. The development of red colour is related to different phenomena: symmetry lowering from hexagonal (Nd) to orthorhombic (Sm-Yb); crystal field strength decrease due to an octahedral tilting distortion with longer (Al,Cr)-O distances in HREE perovskites; shift of a broad absorption band in the bluegreen spectrum depending on the lanthanide ion.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.264-268.1549