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.
Study of the mechanism of coloration in red ceramic pigments based on perovskite structure
Dondi M;
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.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
