A series of four different powders ceria doped Ce1-xErxO2-delta (0.05 lt = x lt = 0.20) were synthesized by applying self-propagating reaction at room temperature (SPRT method). SPRT procedure is based on the self-propagating room temperature reaction between metal nitrates and sodium hydroxide, wherein the reaction is spontaneous and terminates extremely fast. The method is known to assure very precise stoichiometry of the final product in comparison with a tailored composition. XRPD, Raman spectroscopy, TEM and BET measurements were used to characterize the nanopowders at room temperature. It was shown that all obtained powders were single phase solid solutions with a fluorite-type crystal structure and all powder particles have nanometric size (about 3-4 nm). Densification was performed at 1550 degrees C, in an air atmosphere for 2 h. XRPD, SEM and complex impedance method measurements were carried out on sintered samples. Single phase form was evidenced for each sintered material...s. The best value of conductivity at 700 degrees C amounted to 1.10 x 10(-2) Omega(-1) cm(-1) for Ce0.85Er0.O-3(2-delta) sample. Corresponding activation energies of conductivity amounted to 0.28 eV in the temperature range 500-700 degrees C.
Keywords:
X-ray scattering / Sintering / Raman spectroscopy / Oxides / Electron microscopy (TEM and SEM) / Ceramics
Source:
Materials Chemistry and Physics, 2015, 153, 422-431
Publisher:
Elsevier Science Sa, Lausanne
Funding / projects:
A.von Humboldt foundationAlexander von Humboldt Foundation
TY - JOUR
AU - Stojmenović, M.
AU - Bošković, Snežana B
AU - Žunić, Milan
AU - Babić, Biljana M.
AU - Matović, Branko
AU - Bajuk-Bogdanović, Danica
AU - Mentus, S.
PY - 2015
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/872
AB - A series of four different powders ceria doped Ce1-xErxO2-delta (0.05 lt = x lt = 0.20) were synthesized by applying self-propagating reaction at room temperature (SPRT method). SPRT procedure is based on the self-propagating room temperature reaction between metal nitrates and sodium hydroxide, wherein the reaction is spontaneous and terminates extremely fast. The method is known to assure very precise stoichiometry of the final product in comparison with a tailored composition. XRPD, Raman spectroscopy, TEM and BET measurements were used to characterize the nanopowders at room temperature. It was shown that all obtained powders were single phase solid solutions with a fluorite-type crystal structure and all powder particles have nanometric size (about 3-4 nm). Densification was performed at 1550 degrees C, in an air atmosphere for 2 h. XRPD, SEM and complex impedance method measurements were carried out on sintered samples. Single phase form was evidenced for each sintered materials. The best value of conductivity at 700 degrees C amounted to 1.10 x 10(-2) Omega(-1) cm(-1) for Ce0.85Er0.O-3(2-delta) sample. Corresponding activation energies of conductivity amounted to 0.28 eV in the temperature range 500-700 degrees C.
PB - Elsevier Science Sa, Lausanne
T2 - Materials Chemistry and Physics
T1 - Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC
EP - 431
SP - 422
VL - 153
DO - 10.1016/j.matchemphys.2015.01.036
ER -
@article{
author = "Stojmenović, M. and Bošković, Snežana B and Žunić, Milan and Babić, Biljana M. and Matović, Branko and Bajuk-Bogdanović, Danica and Mentus, S.",
year = "2015",
abstract = "A series of four different powders ceria doped Ce1-xErxO2-delta (0.05 lt = x lt = 0.20) were synthesized by applying self-propagating reaction at room temperature (SPRT method). SPRT procedure is based on the self-propagating room temperature reaction between metal nitrates and sodium hydroxide, wherein the reaction is spontaneous and terminates extremely fast. The method is known to assure very precise stoichiometry of the final product in comparison with a tailored composition. XRPD, Raman spectroscopy, TEM and BET measurements were used to characterize the nanopowders at room temperature. It was shown that all obtained powders were single phase solid solutions with a fluorite-type crystal structure and all powder particles have nanometric size (about 3-4 nm). Densification was performed at 1550 degrees C, in an air atmosphere for 2 h. XRPD, SEM and complex impedance method measurements were carried out on sintered samples. Single phase form was evidenced for each sintered materials. The best value of conductivity at 700 degrees C amounted to 1.10 x 10(-2) Omega(-1) cm(-1) for Ce0.85Er0.O-3(2-delta) sample. Corresponding activation energies of conductivity amounted to 0.28 eV in the temperature range 500-700 degrees C.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC",
pages = "431-422",
volume = "153",
doi = "10.1016/j.matchemphys.2015.01.036"
}
Stojmenović, M., Bošković, S. B., Žunić, M., Babić, B. M., Matović, B., Bajuk-Bogdanović, D.,& Mentus, S.. (2015). Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 153, 422-431.
https://doi.org/10.1016/j.matchemphys.2015.01.036
Stojmenović M, Bošković SB, Žunić M, Babić BM, Matović B, Bajuk-Bogdanović D, Mentus S. Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC. in Materials Chemistry and Physics. 2015;153:422-431.
doi:10.1016/j.matchemphys.2015.01.036 .
Stojmenović, M., Bošković, Snežana B, Žunić, Milan, Babić, Biljana M., Matović, Branko, Bajuk-Bogdanović, Danica, Mentus, S., "Studies on structural, morphological and electrical properties of Ce1-xErxO2-delta (x=0.05-0.20) as solid electrolyte for IT - SOFC" in Materials Chemistry and Physics, 153 (2015):422-431,
https://doi.org/10.1016/j.matchemphys.2015.01.036 . .
