We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Novel Y<sub>2− x</sub>Pr <sub>x</sub>Ru<sub>2</sub>O<sub>7</sub> ( x=0–2) Pyrochlore Oxides Prepared Using a Soft Chemistry Route and their Electrical Properties.
- Authors
Abate, Chiara; Esposito, Vincenzo; Duncan, Keith; Nino, Juan C.; Gattia, Daniele Mirabile; Wachsman, Eric D.; Traversa, Enrico
- Abstract
Y2− xPr xRu2O7 (0≤ x≤2) 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.
- Subjects
OXIDES; ELECTRON microscopy; SCANNING electron microscopy; X-ray photoelectron spectroscopy; CRYSTALS; OXIDATION; ELECTRIC conductivity; FREE electron theory of metals; SUPERCONDUCTIVITY
- Publication
Journal of the American Ceramic Society, 2010, Vol 93, Issue 7, p1970
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2010.03666.x