Title of article :
Crystal structure, thermal expansion and electrical conductivity of dual-phase Gd0.8Sr0.2Co1−yFeyO3−δ (0≤y≤1.0)
Author/Authors :
Dyck، نويسنده , , C.R. and Peterson، نويسنده , , R.C. and YU، نويسنده , , Z.B. and Krstic، نويسنده , , V.D.، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2005
Pages :
6
From page :
103
To page :
108
Abstract :
Compositions in the Gd0.8Sr0.2Co1−yFeyO3−δ (0≤y≤1.0) system were synthesized and the atomic structures were refined by Rietveld analysis of X-ray powder diffraction data. Thermal expansion and electrical conductivity were determined using dilatometry and four-point DC, respectively. A stable dual-phase perovskite system was shown to exist for all compositions. The primary phase had an orthorhombic symmetry (Pnma, #62) and the secondary phase had a cubic symmetry (Pm-3m, #221). Sr preferentially partitioned into the secondary cubic phase. Both the thermal expansion coefficient and the electrical conductivity decreased with increasing iron content. The potential for producing stable dual-phase perovskites opens up possibilities in material design for solid oxide fuel cell (SOFC) cathodes.
Keywords :
Perovskite , Rietveld analysis , powder diffraction , electrical conductivity , Thermal expansion
Journal title :
Solid State Ionics
Serial Year :
2005
Journal title :
Solid State Ionics
Record number :
1717440
Link To Document :
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