Solid Solubility of Neodymium in BaCeO3

Autor: Darko Makovec, Drago Kolar, Zoran Samardzija
Rok vydání: 2005
Předmět:
Zdroj: Journal of the American Ceramic Society. 80:3145-3150
ISSN: 1551-2916
0002-7820
DOI: 10.1111/j.1151-2916.1997.tb03243.x
Popis: Incorporation of Nd into the BaCeO3 perovskite structure was studied by quantitative wavelength dispersive spectroscopy-electron probe microanalysis (WDS/EPMA) in combination with scanning electron microscopy (SEM) and X-ray powder diffractometry (XRPD). Highly Nd-doped BaCeO3 specimens, synthesized by mixed oxide technology, were sintered at 1400°C in ambient air. Concentrations of cations obtained by microanalysis were calculated to the ABO3 perovskite formula, considering incorporation of Nd at Ba as well as at Ce sites. Nd-BaCeO3 solid solutions may be represented by the general formula Ba1−XNdXCe1−YNdYO3−(Y-X)/2(VO)(Y-X)/2. The ratio between Nd incorporated at Ba sites and at Ce sites (X/Y) is a function of the starting composition, changing from 1 in the CeO2-rich part of the BaO-CeO2-Nd2O3 system, to ~0.1 in the BaO-rich part of the system.
Databáze: OpenAIRE
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