Effect of oxygen pressure on structural and electrical properties of Ba0.5Sr0.5Co0.8Fe0.2O3−δ/SrTiO3(200) by reactive pulsed laser deposition

Daneshmandi, Samira; Sohrabi, Parisa; Salamati, H.; Ranjbar, M.

doi:10.1016/j.matlet.2013.07.086

Cited by 4 publications

(1 citation statement)

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“…Perovskite oxide (ABO 3 ) such as Ba 0.5 Sr 0.5 Co 0.8 Fe 3-δ (BSCF) is attractive for high oxygen catalytic activity and possessing mixed ionic-electronic conduction (MIEC). Such properties have received considerable attention for the application of solid oxide fuel cell (SOFC), gas separation and catalytic conversion [1][2]. Recent SOFC research activities are devoted towards reduction of operating temperature for better durability and stability of the cell.…”

Section: Introductionmentioning

confidence: 99%

Effects of Milling Speed and Calcination Temperature on the Phase Stability of Ba0.5Sr0.5Co0.8Fe3-δ

Rahman

Afandi

2017

MSF

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The phase instability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) is widely reported in atmospheres containing carbon dioxide, which affects the long term electrochemical performance. The aim of this study is to investigate the phase stability of BSCF under the influence of milling and calcination temperature. Commercial BSCF powder was milled at 200 and 500 rpm and subsequently calcined at 750, 800 and 900 °C. The BSCF samples were characterized by using X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM). Secondary phases that were triggered after milling, however reduced with the increase of calcination temperature up to 800 °C. It was also found that the reduction of crystallite size and particle size at increased calcination temperature might be affected by the removal of these secondary carbonate phases. Moreover, the removal of carbonate was clearly evidenced in FTIR spectra by the reduction of carbonate signal intensities. In brief, a minimum calcination temperature of 900 °C was suggested for successful carbonate removal and recovery of single BSCF phase.

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Section: Introductionmentioning

confidence: 99%