Structural Analysis of Ce Doped La_{1-x}Sr_xCo_{1-y}Fe_yO_{3-δ} Nanopowders Synthesized by Glycine-Nitrate Gel Combustion

• Authors: Ö. Yildiz , A. Soydan , A. Ata , E. İpçızade , D. Akin , Ö. Uçak
• Languages of publication: EN

Abstracts

EN

Ce doped La_{1-x}Sr_xCo_{1-y}Fe_yO_3 (LCSCF) is a widely used cathode material due to its high catalytic activity for oxygen reduction and high oxygen exchange coefficient. LCSCF is also known with its high ionic and electronic conductivities and low electrode polarization losses which are highly critical properties for low temperature solid oxide fuel cell applications. In this study, structural properties of the LCSCF cathode nanopowder materials synthesized by glycine-nitrate gel combustion have been investigated by X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, and nanosizer. Synthesized nanopowders represent volcanic ash like structures and morphologies. Ce, Sr, Co, and Fe are found to have significant effects on the structural properties of powders in terms of powders morphology, agglomerate structure, crystallite size and also lattice parameter of perovskite crystal. All synthesized ash powders have particle sizes around 50-600 nm, varying crystalline structures of perovskite and fluorite depending on molar ratio of Ce in the composition. Increasing molar Ce ratio over 0.4 is found to lead to the formation of a separate nano ceria phase in fluorite crystal structure on the surface of the synthesized powder.

Keywords

EN

81.07.Wx; 81.07.-b; 81.20.Ka; 88.30.pn

Discipline

• 88.30.pn: Solid oxide fuel cells
• 81.07.Wx: Nanopowders
• 81.07.-b: Nanoscale materials and structures: fabrication and characterization(for structure of nanoscale materials, see 61.46.-w; for nanostructured materials in electrochemistry, see 82.45.Yz; see also 62.23.-c Structural classes of nanoscale systems in mechanical properties of condensed matter)
• 81.20.Ka: Chemical synthesis; combustion synthesis(for electrochemical synthesis, see 82.45.Aa)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 2
• Pages: 669-672

Dates

published

2014-02

Contributors

author

Ö. Yildiz

• Kocaeli University, Faculty of Engineering, Department of Metallurgical and Materials Engineering TR-41380 Kocaeli, Turkey

author

A. Soydan

• Gebze Institute of Technology, Faculty of Engineering, Department of Materials Science and Engineering TR-41400 Gebze/Kocaeli, Turkey

author

A. Ata

• Gebze Institute of Technology, Faculty of Engineering, Department of Materials Science and Engineering TR-41400 Gebze/Kocaeli, Turkey

author

E. İpçızade

• Gebze Institute of Technology, Faculty of Engineering, Department of Materials Science and Engineering TR-41400 Gebze/Kocaeli, Turkey

author

D. Akin

• Gebze Institute of Technology, Faculty of Engineering, Department of Materials Science and Engineering TR-41400 Gebze/Kocaeli, Turkey

author

Ö. Uçak

• Gebze Institute of Technology, Faculty of Engineering, Department of Materials Science and Engineering TR-41400 Gebze/Kocaeli, Turkey

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Identifiers

DOI

10.12693/APhysPolA.125.669