Structure, phase transitions and optical properties of pure and rare earth doped BaCeO3, SrCeO3 prepared by inductive melting

被引:51
作者
Melekh, BT [1 ]
Egorov, VM [1 ]
Baikov, YM [1 ]
Kartenko, NF [1 ]
Filin, YN [1 ]
Kompan, ME [1 ]
Novak, II [1 ]
Venus, GB [1 ]
Kulik, VB [1 ]
机构
[1] RUSSIAN ACAD SCI,IOFFE PHYSICOTECH INST,ST PETERSBURG 194021,RUSSIA
关键词
high-temperature proton conductors; barium cerate; strontium cerate; acceptor doped cerates; structure; phase transition;
D O I
10.1016/S0167-2738(97)00093-3
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:465 / 470
页数:6
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