Solid Solubility of Neodymium in BaCeO3

• Published in: Journal of the American Ceramic Society 1997-12, Vol.80 (12), p.3145-3150
• Main Authors: Makovec, Darko, Samardzija, Zoran, Kolar, Drago
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Physics; Solubility, segregation, and mixing; phase separation
• ISSN: 0002-7820; 1551-2916
• DOI: 10.1111/j.1151-2916.1997.tb03243.x

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.