Improved total conductivity of nanometric samaria-doped ceria powders sintered with molten LiNO3 additive
Abstract
Nanometric 20% molar Sm-doped ceria (SDC20) powders were synthesized by co-precipitation in the presence of N, N, N', N' tetramethylethylendiamine (TMEDA). SDC20 powders were sintered using lithium nitrate salt in various concentrations (0.1, 1, 3, and 10 mol% with respect to the SDC20 total moles) as an additive to promote the liquid phase sintering and without additive for comparison. The addition of the Li salt allowed reducing significantly the sintering temperature of SDC. Electrochemical impedance spectroscopy (EIS) measurements were performed to estimate the contribution of grain boundary and bulk to the electrical conductivity in different sintering conditions. Liquid phase sintering allowed to produce dense samples with enhanced ionic conductivity especially at the grain boundary when compared to the samples sintered without additive. The additive liquid phase was evaporated in large part at the high temperatures throughout the sintering process. Residual extra phases were seg...regated at the grain boundary. generated probably by reaction of the Li salt with impurities, which were removed by a chemical etching.
Keywords:
Sintering / Nano-powders / Melting salts / Doped ceriaSource:
Solid State Ionics, 2009, 180, 17-19, 1069-1075Publisher:
- Elsevier, Amsterdam
Funding / projects:
- Ministry of University and Research (MiUR)Ministry of Education, Universities and Research (MIUR)
DOI: 10.1016/j.ssi.2009.05.015
ISSN: 0167-2738
WoS: 000268565300007
Scopus: 2-s2.0-67649119631
Collections
Institution/Community
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Esposito, Vincenzo AU - Žunić, Milan AU - Traversa, Enrico PY - 2009 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/302 AB - Nanometric 20% molar Sm-doped ceria (SDC20) powders were synthesized by co-precipitation in the presence of N, N, N', N' tetramethylethylendiamine (TMEDA). SDC20 powders were sintered using lithium nitrate salt in various concentrations (0.1, 1, 3, and 10 mol% with respect to the SDC20 total moles) as an additive to promote the liquid phase sintering and without additive for comparison. The addition of the Li salt allowed reducing significantly the sintering temperature of SDC. Electrochemical impedance spectroscopy (EIS) measurements were performed to estimate the contribution of grain boundary and bulk to the electrical conductivity in different sintering conditions. Liquid phase sintering allowed to produce dense samples with enhanced ionic conductivity especially at the grain boundary when compared to the samples sintered without additive. The additive liquid phase was evaporated in large part at the high temperatures throughout the sintering process. Residual extra phases were segregated at the grain boundary. generated probably by reaction of the Li salt with impurities, which were removed by a chemical etching. PB - Elsevier, Amsterdam T2 - Solid State Ionics T1 - Improved total conductivity of nanometric samaria-doped ceria powders sintered with molten LiNO3 additive EP - 1075 IS - 17-19 SP - 1069 VL - 180 DO - 10.1016/j.ssi.2009.05.015 ER -
@article{ author = "Esposito, Vincenzo and Žunić, Milan and Traversa, Enrico", year = "2009", abstract = "Nanometric 20% molar Sm-doped ceria (SDC20) powders were synthesized by co-precipitation in the presence of N, N, N', N' tetramethylethylendiamine (TMEDA). SDC20 powders were sintered using lithium nitrate salt in various concentrations (0.1, 1, 3, and 10 mol% with respect to the SDC20 total moles) as an additive to promote the liquid phase sintering and without additive for comparison. The addition of the Li salt allowed reducing significantly the sintering temperature of SDC. Electrochemical impedance spectroscopy (EIS) measurements were performed to estimate the contribution of grain boundary and bulk to the electrical conductivity in different sintering conditions. Liquid phase sintering allowed to produce dense samples with enhanced ionic conductivity especially at the grain boundary when compared to the samples sintered without additive. The additive liquid phase was evaporated in large part at the high temperatures throughout the sintering process. Residual extra phases were segregated at the grain boundary. generated probably by reaction of the Li salt with impurities, which were removed by a chemical etching.", publisher = "Elsevier, Amsterdam", journal = "Solid State Ionics", title = "Improved total conductivity of nanometric samaria-doped ceria powders sintered with molten LiNO3 additive", pages = "1075-1069", number = "17-19", volume = "180", doi = "10.1016/j.ssi.2009.05.015" }
Esposito, V., Žunić, M.,& Traversa, E.. (2009). Improved total conductivity of nanometric samaria-doped ceria powders sintered with molten LiNO3 additive. in Solid State Ionics Elsevier, Amsterdam., 180(17-19), 1069-1075. https://doi.org/10.1016/j.ssi.2009.05.015
Esposito V, Žunić M, Traversa E. Improved total conductivity of nanometric samaria-doped ceria powders sintered with molten LiNO3 additive. in Solid State Ionics. 2009;180(17-19):1069-1075. doi:10.1016/j.ssi.2009.05.015 .
Esposito, Vincenzo, Žunić, Milan, Traversa, Enrico, "Improved total conductivity of nanometric samaria-doped ceria powders sintered with molten LiNO3 additive" in Solid State Ionics, 180, no. 17-19 (2009):1069-1075, https://doi.org/10.1016/j.ssi.2009.05.015 . .