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Electrical conductivity of nanostructured acceptor-doped ceria fabricated by spark plasma sintering (SPS)
Abstract
High purity nanoscale powders (~10–15 nm size) of two different compositions of ceria, doped with Gd3+ and Ca2+, have been consolidated by spark plasma sintering (SPS) at different temperatures. Fully-dense samples were observed only at a sintering temperature of 980 °C. The as-sintered samples showed rather fast grain growth with an average grain size below 300 nm. The electrical properties of the samples were evaluated by impedance spectroscopy over a wide range of temperatures (300–550 °C) in air. Electrical conductivity significantly enhanced with increasing sintering temperature. The compounds show an electrical blocking effect at the grain boundary, depending on the doping cations.
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Authors (4)
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Ahsanul Kabir
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Sofie Colding-Jørgensen
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Vincenzo Esposito
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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MATERIALS LETTERS
no. 279,
ISSN: 0167-577X - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Kabir A., Colding-Jørgensen S., Molin S., Esposito V.: Electrical conductivity of nanostructured acceptor-doped ceria fabricated by spark plasma sintering (SPS)// MATERIALS LETTERS -Vol. 279, (2020), s.128513-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.matlet.2020.128513
- Verified by:
- Gdańsk University of Technology
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