Solid State Ionics, Vol.97, No.1-4, 465-470, 1997
Structure, Phase-Transitions and Optical-Properties of Pure and Rare-Earth-Doped Baceo3, Srceo3 Prepared by Inductive Melting
Fused crystalline BaCe(1-x)Ln(x)O(3-delta) (Ln = Y,Gd,Nd, 0 < x < 0.2), and SrCe1-xDyxO3-delta (x = 0; 0.05) have been prepared by inductive melting. XRPD measurements have showed that annealed BaCeO3 was orthorhombic. DSC spectra of BaCeO3 have showed two peaks at 533 K and 630 K. Phase transitions in the range 270-900 K were not revealed in BaCe0.8Y0.2O3-delta, BaCe0.9Nd0.1O3-delta and SrCeO3. For comparison ceramic BaCeO3:Gd was considered. Raman spectra of BaCeO3 have confirmed the X-ray data on the orthorhombic symmetry for annealed samples. Eu-luminescence study of BaCeO3:(Y + Eu) has confirmed the octahedral oxygen enviroment of trivalent dopant ions.