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High Sinterability Doped Scandia Zirconia Powders

Research output: Chapter in Book/Report/Conference proceedingConference contribution

DOI

Author(s)

E. de Carvalho, J. T. S. Irvine

School/Research organisations

Abstract

The compound (CeO(2))(1)(Y(2)O(3))(0.2)(Sc(2)O(3))(9.2)(ZrO(2))(89.6) can be considered as a low ceria substituted scandia zirconia and has been investigated as a model composition for possible intermediate temperature electrolyte for SOFCs. The compound was produced by an innovative sol-gel and combustion method in an attempt to obtain a compositionally homogenous dense material. X-ray diffraction confirmed the expected cubic fluorite structure. Particle size analysis and SEM show a wide size range and indicate nano-particle agglomerates with platelet shape. The effects of milling have been investigated. The conductivity was measured by AC impedance spectroscopy. Two linear regions in Arrhenius plots were observed. The lower temperature region exhibited activation energy around 1.24 eV and the high temperature region 0.73 eV The ionic conductivity at 800 degrees C was 0.07 Scm(-1).

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Details

Original languageEnglish
Title of host publicationSOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2
EditorsK Eguchi, SC Singhai, H Yokokawa, H Mizusaki
Place of PublicationPENNINGTON
PublisherELECTROCHEMICAL SOCIETY INC
Pages2223-2231
Number of pages9
ISBN (Print)978-1-56677-554-0
DOIs
Publication statusPublished - 2007
Event10th International Symposium on Solid Oxide Fuel Cells - Nara, Japan
Duration: 3 Jun 20078 Jun 2007

Publication series

NameECS Transactions
PublisherELECTROCHEMICAL SOCIETY INC
Volume7
ISSN (Print)1938-5862

Conference

Conference10th International Symposium on Solid Oxide Fuel Cells
CountryJapan
CityNara
Period3/06/078/06/07

    Research areas

  • SYSTEM, ELECTROLYTE, STABILITY, FUEL-CELLS

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