Synthesis, Characterization and Densification of Samaria Doped Ceria (SDC) ultra-fine Powders

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

Research output: Contribution to journalConference articleResearchpeer-review

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.
Original languageEnglish
JournalE C S Transactions
Volume1
Issue number7
Pages (from-to)35-50
ISSN1938-5862
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event208th ECS Meeting - Los Angeles, California, United States
Duration: 16 Oct 200521 Oct 2005

Conference

Conference208th ECS Meeting
CountryUnited States
CityLos Angeles, California
Period16/10/200521/10/2005

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