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

Published online by Cambridge University Press:  26 February 2011

Vincenzo Esposito ,
Marco Fronzi  and
Enrico Traversa
Vincenzo Esposito
Affiliation:
[email protected], University of Rome Tor Vergata, Scienze e Tecnologie Chimiche, Viale della ricerca Scientifica, Rome, 00155, Italy, 0039 06 72594483
Marco Fronzi
Affiliation:
[email protected], Università di Roma Tor Vergata, Scienze e tecnologie Chimiche, Viale della ricerca scientifica, Rome, 00155, Italy
Enrico Traversa
Affiliation:
[email protected], Università di Roma Tor Vergata, Scienze e tecnologie Chimiche, Viale della ricerca scientifica, Rome, 00155, Italy
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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.

Keywords

ceramicsinteringelectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA03-01
Copyright
Copyright © Materials Research Society 2007

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