TY - GEN
T1 - Synthesis, characterization and densification of Samaria Doped Ceria (SDC) ultra-fine powders
AU - Esposito, Vincenzo
AU - Bac, Huu Luong
AU - Fronzi, Marco
AU - Traversa, Enrico
PY - 2006
Y1 - 2006
N2 - Nanometric Samaria 20% mol Doped Ceria (SDC20) powders were synthesized by a co-precipitation method. Nano-sized SDC20 powders (crystal size ∼ 15 nm) were obtained by calcination at 600°C. The powders were formed by uniaxial pressure and then sintered. Sintering procedures were led both conventionally, at 1500°C for different sintering times (1, 5, and 10 h), and by fast firing process at different temperatures (1200, 1300, 1400, 1500, and 1600°C for ∼ 0.1 h). Different microstructures were obtained from the different thermal treatments. Electrochemical impedance spectroscopy (EIS) was used to determine total conductivity and to separate bulk and grain boundary impedance contributions. As expected, densification and electrical properties of the conventionally sintered samples showed to be mainly dependent on the average grain size. On the other hand, for the fast fired samples, lattice diffusion mechanism mainly controlled the densification, boundary arrangement and the resulting microstructures at various temperatures. copyright The Electrochemical Society.
AB - Nanometric Samaria 20% mol Doped Ceria (SDC20) powders were synthesized by a co-precipitation method. Nano-sized SDC20 powders (crystal size ∼ 15 nm) were obtained by calcination at 600°C. The powders were formed by uniaxial pressure and then sintered. Sintering procedures were led both conventionally, at 1500°C for different sintering times (1, 5, and 10 h), and by fast firing process at different temperatures (1200, 1300, 1400, 1500, and 1600°C for ∼ 0.1 h). Different microstructures were obtained from the different thermal treatments. Electrochemical impedance spectroscopy (EIS) was used to determine total conductivity and to separate bulk and grain boundary impedance contributions. As expected, densification and electrical properties of the conventionally sintered samples showed to be mainly dependent on the average grain size. On the other hand, for the fast fired samples, lattice diffusion mechanism mainly controlled the densification, boundary arrangement and the resulting microstructures at various temperatures. copyright The Electrochemical Society.
UR - http://www.scopus.com/inward/record.url?scp=33845246838&partnerID=8YFLogxK
U2 - 10.1149/1.2215541
DO - 10.1149/1.2215541
M3 - Conference contribution
AN - SCOPUS:33845246838
SN - 1566774942
SN - 9781566774949
T3 - ECS Transactions
SP - 35
EP - 50
BT - Solid State Ionic Devices IV
PB - Electrochemical Society Inc.
T2 - 4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society
Y2 - 16 October 2005 through 21 October 2005
ER -