Synthesis, characterization and densification of Samaria Doped Ceria (SDC) ultra-fine powders

Vincenzo Esposito*, Huu Luong Bac, Marco Fronzi, Enrico Traversa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publicationSolid State Ionic Devices IV
Pages35-50
Number of pages16
Edition7
DOIs
StatePublished - Dec 1 2005
Event4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society - Los Angeles, CA, United States
Duration: Oct 16 2005Oct 21 2005

Publication series

NameECS Transactions
Number7
Volume1
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other4th International Symposium on Solid-State Ionic Devices - 208th Meeting of the Electrochemical Society
CountryUnited States
CityLos Angeles, CA
Period10/16/0510/21/05

ASJC Scopus subject areas

  • Engineering(all)

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