Novel Y2-xPrxRu2O7 (x = 0–2) Pyrochlore Oxides Prepared Using a Soft Chemistry Route and their Electrical Properties

Chiara Abate, Vincenzo Esposito, Keith Duncan, Juan C. Nino, Daniele Mirabile Gattia, Eric D. Wachsman, Enrico Traversa

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Y2xPrxRu2O7 (0rxr2) pyrochlore powders were prepared using a precipitation method, which allowed control of their composition and morphology. Materials structure and morphology were characterized by X-ray diffraction analysis and field emission scanning electron microscopy, respectively. All the synthesized powders exhibited a single pyrochlore phase with particle size depending on the Pr content. Powders with Pr content smaller than 25 mol% were nanometric. X-ray photoelectron spectroscopy analysis revealed a mixed oxidation state of both Pr and Ru, and a variation of the oxidation state of the elements in response to oxygen partial pressure changes. Electrical conductivity measurements were performed by dc 4-probe method at several temperatures, showing that increasing the Pr content in the A site of the pyrochlore structure increased the oxide electrical conductivity.
Original languageEnglish
JournalJournal of the American Ceramic Society
Volume93
Issue number7
Pages (from-to)1970-1977
ISSN0002-7820
DOIs
Publication statusPublished - 2010
Externally publishedYes

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