Imperial College London

Dr Samuel J Cooper

Faculty of EngineeringDyson School of Design Engineering

Lecturer
 
 
 
//

Contact

 

samuel.cooper Website

 
 
//

Location

 

ObservatorySouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Niania:2018:10.1039/c8ta01341a,
author = {Niania, M and Podor, R and Britton, TB and Li, C and Cooper, SJ and Svetkov, N and Skinner, S and Kilner, J},
doi = {10.1039/c8ta01341a},
journal = {Journal of Materials Chemistry A},
pages = {14120--14135},
title = {In situ study of strontium segregation in La<inf>0.6</inf>Sr<inf>0.4</inf>Co<inf>0.2</inf>Fe<inf>0.8</inf>O<inf>3- δ</inf>in ambient atmospheres using high-temperature environmental scanning electron microscopy},
url = {http://dx.doi.org/10.1039/c8ta01341a},
volume = {6},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Samples of the solid oxide fuel cell cathode material La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF) were annealed using High-Temperature Environmental Scanning Electron Microscopy (HT-ESEM) from room temperature to 1000 °C in atmospheres of pure oxygen, pure water and ambient lab air. Image series of each heat treatment were taken where microstructural changes were observed and compared between samples. Strontium segregation rate was found to be significantly increased in the presence of pure water as compared to pure O2and ambient air. Electron backscattered diffraction (EBSD) was performed in order to assess the effect of crystal orientation on particle formation and surface sensitive chemical analysis techniques were used to determine the chemical changes at the grain surface as a result of the different heat treatments. It was shown that crystal orientation affected the nature and growth rate of strontium-based particles, however, due to the pseudo-symmetry of La0.6Sr0.4Co0.2Fe0.8O3-δ, precise crystal orientation relationships could not be determined. The chemical composition of the grain surface was found to be approximately equal under each atmosphere.
AU - Niania,M
AU - Podor,R
AU - Britton,TB
AU - Li,C
AU - Cooper,SJ
AU - Svetkov,N
AU - Skinner,S
AU - Kilner,J
DO - 10.1039/c8ta01341a
EP - 14135
PY - 2018///
SN - 2050-7496
SP - 14120
TI - In situ study of strontium segregation in La<inf>0.6</inf>Sr<inf>0.4</inf>Co<inf>0.2</inf>Fe<inf>0.8</inf>O<inf>3- δ</inf>in ambient atmospheres using high-temperature environmental scanning electron microscopy
T2 - Journal of Materials Chemistry A
UR - http://dx.doi.org/10.1039/c8ta01341a
UR - http://hdl.handle.net/10044/1/64586
VL - 6
ER -