TY - JOUR
T1 - Enhancing densification and electrical properties of Sm-doped ceria with Ca and Zn as sintering aids
AU - Martinez-De la Rosa, G.
AU - Diaz-Guillen, J. A.
AU - Diaz-Guillen, M. R.
AU - Dura, O. J.
AU - Gonzalez-Garcia, K. A.
AU - Bazaldua-Medellin, M. E.
AU - Resendiz-Hernandez, P. J.
AU - Padmasree, K. P.
N1 - Publisher Copyright:
© 2023 Hydrogen Energy Publications LLC
PY - 2024/2/15
Y1 - 2024/2/15
N2 - Ca and Zn were incorporated as sintering aids in Sm-doped ceria resulting in materials of general formula A0.02Sm0.08Ce0.9O1.94 for their use as solid electrolytes in Low Temperature-SOFCs. The synthesis was performed with 20 hours of mechanochemical ball-milling and XRD analyses revealed a cubic fluorite-like structure of the ceria and a promoted crystallinity with heat treatments up to 1500 degrees C. SEM images showed microstructures with larger grain sizes and less remnant porosity in the Zn-containing systems. Zn improved the relative density (92.95 %) of SDC when sintered at low temperatures such as 1200 degrees C, however, both Ca and Zn increased the electrical conductivity, with the highest value of 8.39 x 10-2 S/cm at 650 degrees C for the Zn-SDC system. Pure SDC and Ca-SDC resulted in lower relative densities and enhanced thermal insulation properties when sintered at 1200 degrees C.
AB - Ca and Zn were incorporated as sintering aids in Sm-doped ceria resulting in materials of general formula A0.02Sm0.08Ce0.9O1.94 for their use as solid electrolytes in Low Temperature-SOFCs. The synthesis was performed with 20 hours of mechanochemical ball-milling and XRD analyses revealed a cubic fluorite-like structure of the ceria and a promoted crystallinity with heat treatments up to 1500 degrees C. SEM images showed microstructures with larger grain sizes and less remnant porosity in the Zn-containing systems. Zn improved the relative density (92.95 %) of SDC when sintered at low temperatures such as 1200 degrees C, however, both Ca and Zn increased the electrical conductivity, with the highest value of 8.39 x 10-2 S/cm at 650 degrees C for the Zn-SDC system. Pure SDC and Ca-SDC resulted in lower relative densities and enhanced thermal insulation properties when sintered at 1200 degrees C.
KW - Mechanochemistry
KW - SOFC
KW - Sm-doped ceria
KW - Solid electrolytes
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UR - http://www.scopus.com/inward/record.url?scp=85179607045&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2023.11.290
DO - 10.1016/j.ijhydene.2023.11.290
M3 - Article
SN - 0360-3199
VL - 55
SP - 270
EP - 276
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
ER -