Synthesis and Densification of Nanometric Ce0.8Sm0.2O1.9-δ

Vincenzo Esposito, Marco Fronzi, Enrico Traversa

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Abstract

Nanometric 20% molar Sm-doped ceria (SDC20) powders were synthesized by tetrametylethylen ammine (TMDA) co-precipitation method. SDC20 was sintered in several conditions to control the final microstructure. Fast firing and conventional sintering were performed. LiNO3 was used as an additive to promote liquid phase sintering of ceria at low temperatures (900-1200°C). Powders and dense pellets were analysed using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). Electrochemical impedance spectroscopy (EIS) measurements were performed on dense pellets in air to estimate the contribution of grain boundary and bulk to the electrical conductivity. Liquid phase sintering produced the densest samples with the highest conductivity.
Original languageEnglish
Book seriesM R S Online Proceedings
Volume972
ISSN1946-4274
Publication statusPublished - 2007
Externally publishedYes
Event2006 MRS Fall Meeting & Exhibit - Boston, MA, United States
Duration: 27 Nov 20061 Dec 2006

Conference

Conference2006 MRS Fall Meeting & Exhibit
CountryUnited States
CityBoston, MA
Period27/11/200601/12/2006

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