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

Research output: Contribution to journalJournal article – Annual report year: 2010Researchpeer-review

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  • Author: Abate, Chiara

    Università degli Studi di Roma Tor Vergata

  • Author: Esposito, Vincenzo

    Università degli Studi di Roma Tor Vergata

  • Author: Duncan, Keith

    University of Florida

  • Author: Nino, Juan C.

    University of Florida

  • Author: Gattia, Daniele Mirabile

    Agenzia nazionale per le nuove tecnologie, l’energia e lo sviluppo economico sostenibile

  • Author: Wachsman, Eric D.

    University of Florida

  • Author: Traversa, Enrico

    Università degli Studi di Roma Tor Vergata

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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
CitationsWeb of Science® Times Cited: No match on DOI

ID: 6329852