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Abstract
In this report, the high-temperature transport properties of (Dy1−xCax)(Zr0.2Hf0.2Sn0.2Ti0.2Ge0.2)O7 pyrochlore oxides with x = 0, 0.05, and 0.1 are studied in dry and humid air. The phase composition and crystal structure were determined by using x-ray and neutron diffraction. The addition of calcium to the structure caused an increase in the concentration of oxygen vacancies, indicating an ionic charge compensation mechanism. Electrical studies allowed us to determine the total electrical conductivity as a function of the synthesis atmosphere and pH2O. The electrical conductivity turned out to be at the level of ∼10−3 S/cm at 800 °C, and only a slight effect of the presence of protonic defects in the structure on the total electrical conductivity was observed. In general, the samples had a low electrical conductivity with a relatively high activation energy of conduction.
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Authors (9)
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Florianne Vayer
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David Berardan
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Claudia Decorse
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Denis Sheptyakov
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Nita Dragoe
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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JOURNAL OF APPLIED PHYSICS
ISSN: 0021-8979 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Miruszewski T., Vayer F., Jaworski D., Berardan D., Decorse C., Bochentyn B., Sheptyakov D., Gazda M., Dragoe N.: High-temperature transport properties of entropy-stabilized pyrochlores// JOURNAL OF APPLIED PHYSICS -,iss. 135 (2024), s.085112-
- DOI:
- Digital Object Identifier (open in new tab) 10.1063/5.0180991
- Sources of funding:
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- French Agence Nationale de la Recherche, Grant/Award No. ANR 19-CE30-0030-01
- Project High entropy oxides for energy conversion
- Verified by:
- Gdańsk University of Technology
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