Evidence of Intragranular Segregation of Dopant Cations in Heavily Yttrium-Doped Ceria

Evidence of Intragranular Segregation of Dopant Cations in Heavily Yttrium-Doped Ceria

The intragranular segregation of dopant cations in 25 at% yttrium-doped ceria was explored by energy filtering TEM. Through the comparison between samples sintered at different temperatures, the correlation between the intragranular segregation of dopant cations and the formation of nanosized domain...

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Veröffentlicht in:Electrochemical and solid-state letters 2007, Vol.10 (1), p.P1-P3
Hauptverfasser: Ou, Ding Rong, Mori, Toshiyuki, Ye, Fei, Zou, Jin, Auchterlonie, Graeme, Drennan, John
Format: Artikel
Sprache:eng
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Zusammenfassung:The intragranular segregation of dopant cations in 25 at% yttrium-doped ceria was explored by energy filtering TEM. Through the comparison between samples sintered at different temperatures, the correlation between the intragranular segregation of dopant cations and the formation of nanosized domains in heavily doped ceria is clearly shown. It is suggested that the segregation can lead to domain formation, and the oxygen vacancies may also segregate into the domains with the dopant cations. 19 refs.
ISSN:1099-0062
DOI:10.1149/1.2372224