Study of the mechanism of coloration in red ceramic pigments based on perovskite structure

Conference Paper
Publication Date:
2004
abstract:
The origin of colour in Cr-doped ceramic pigments with AIIIBIIIO3 perovskite structure was investigated by high resolution X-ray diffraction and UV-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.
Iris type:
04.01 Contributo in Atti di convegno
Keywords:
ceramic pigments; perovskite; crystal field theory; x-ray diffraction; UV-Visible-NIR spectroscopy
List of contributors:
Authors of the University:
Handle:
https://iris.cnr.it/handle/20.500.14243/3416
Published in:
KEY ENGINEERING MATERIALS
Series