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

Cite this

Abate, Chiara ; Esposito, Vincenzo ; Duncan, Keith ; Nino, Juan C. ; Gattia, Daniele Mirabile ; Wachsman, Eric D. ; Traversa, Enrico. / Novel Y2-xPrxRu2O7 (x = 0–2) Pyrochlore Oxides Prepared Using a Soft Chemistry Route and their Electrical Properties. In: Journal of the American Ceramic Society. 2010 ; Vol. 93, No. 7. pp. 1970-1977.
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title = "Novel Y2-xPrxRu2O7 (x = 0–2) Pyrochlore Oxides Prepared Using a Soft Chemistry Route and their Electrical Properties",
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.",
author = "Chiara Abate and Vincenzo Esposito and Keith Duncan and Nino, {Juan C.} and Gattia, {Daniele Mirabile} and Wachsman, {Eric D.} and Enrico Traversa",
year = "2010",
doi = "10.1111/j.1551-2916.2010.03666.x",
language = "English",
volume = "93",
pages = "1970--1977",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "7",

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Novel Y2-xPrxRu2O7 (x = 0–2) Pyrochlore Oxides Prepared Using a Soft Chemistry Route and their Electrical Properties. / Abate, Chiara; Esposito, Vincenzo; Duncan, Keith; Nino, Juan C.; Gattia, Daniele Mirabile; Wachsman, Eric D.; Traversa, Enrico.

In: Journal of the American Ceramic Society, Vol. 93, No. 7, 2010, p. 1970-1977.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Novel Y2-xPrxRu2O7 (x = 0–2) Pyrochlore Oxides Prepared Using a Soft Chemistry Route and their Electrical Properties

AU - Abate, Chiara

AU - Esposito, Vincenzo

AU - Duncan, Keith

AU - Nino, Juan C.

AU - Gattia, Daniele Mirabile

AU - Wachsman, Eric D.

AU - Traversa, Enrico

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

U2 - 10.1111/j.1551-2916.2010.03666.x

DO - 10.1111/j.1551-2916.2010.03666.x

M3 - Journal article

VL - 93

SP - 1970

EP - 1977

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 7

ER -