Electrical conductivity of nanostructured acceptor-doped ceria fabricated by spark plasma sintering (SPS) - Publication - Bridge of Knowledge

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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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Category:
Articles
Type:
artykuły w czasopismach
Published in:
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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