TY - JOUR
T1 - Synthesis and characterization of chromium spinels as potential electrode support materials for intermediate temperature solid oxide fuel cells
AU - Stefan, E.
AU - Irvine, J. T. S.
PY - 2011/11
Y1 - 2011/11
N2 - Several spinel compositions, i.e. Mn1+x Cr2-x O-4 (x = 0.7, 0.5, 0), MnFe (x) Cr2-x O-4 (x = 0.1, 1), MgMnCrO4 and Mg1+x Cr2-x O-4 (x = 0, 0.1) were synthesised and studied in terms of phase analysis, density, stability in reducing atmosphere, electrical conductivity and thermal expansion behaviour. The spinel samples were single phase, with cell parameter values in a good correlation with cation sizes. Most of the studied spinels were found to be unstable under reducing conditions of thermal treatment, except MnCr2O4, MgCr2O4 and Mg1.1Cr1.9O4. Electrical properties have been investigated by impedance spectroscopy and DC conductivity measurements at temperatures between 200 and 900 A degrees C.
AB - Several spinel compositions, i.e. Mn1+x Cr2-x O-4 (x = 0.7, 0.5, 0), MnFe (x) Cr2-x O-4 (x = 0.1, 1), MgMnCrO4 and Mg1+x Cr2-x O-4 (x = 0, 0.1) were synthesised and studied in terms of phase analysis, density, stability in reducing atmosphere, electrical conductivity and thermal expansion behaviour. The spinel samples were single phase, with cell parameter values in a good correlation with cation sizes. Most of the studied spinels were found to be unstable under reducing conditions of thermal treatment, except MnCr2O4, MgCr2O4 and Mg1.1Cr1.9O4. Electrical properties have been investigated by impedance spectroscopy and DC conductivity measurements at temperatures between 200 and 900 A degrees C.
U2 - 10.1007/s10853-010-4489-1
DO - 10.1007/s10853-010-4489-1
M3 - Article
SN - 0022-2461
VL - 46
SP - 7191
EP - 7197
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 22
ER -