Temperature dependence of effective grain core/single crystal dielectric constants for acceptor-doped oxygen ion conductors

Nicola H. Perry, Ted C. Yeh, Thomas O Mason

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Effective grain core or single crystal dielectric constants of four solid oxide electrolytes-yttria-stabilized zirconia (YSZ with 8 and 7 mol% yttria), tetragonal zirconia polycrystals (TZP with 3 mol% yttria), strontium- and magnesium-doped lanthanum gallate (LSGM), and gadolinia-doped ceria (GDC, with 20 mol% gadolinia)-were studied as a function of temperature by AC-impedance spectroscopy and equivalent circuit fitting. Unlike their undoped counterparts, the acceptor-doped oxides consistently exhibited an upturn in effective grain core/single crystal dielectric constant in the vicinity of 350-500 K. This temperature-dependent behavior was attributed to the onset of thermally activated dipolar relaxation-an explanation supported by the appearance of loss tangent peaks at higher temperatures. Differences between "effective" dielectric constants and frequency-dependent complex dielectric constants for the grain core/single crystal frequency range, and applications of the effective dielectric constant data are discussed.

Original languageEnglish
Pages (from-to)508-515
Number of pages8
JournalJournal of the American Ceramic Society
Volume94
Issue number2
DOIs
Publication statusPublished - Feb 2011

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Permittivity
Single crystals
Ions
Oxygen
Yttrium oxide
Gadolinium
Oxides
Temperature
Lanthanum
Strontium
Yttria stabilized zirconia
Cerium compounds
Polycrystals
Equivalent circuits
Zirconia
Magnesium
Electrolytes
Spectroscopy
gadolinium oxide
yttria

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Temperature dependence of effective grain core/single crystal dielectric constants for acceptor-doped oxygen ion conductors. / Perry, Nicola H.; Yeh, Ted C.; Mason, Thomas O.

In: Journal of the American Ceramic Society, Vol. 94, No. 2, 02.2011, p. 508-515.

Research output: Contribution to journalArticle

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