Ionic conduction in yttrium aluminum garnet

Ionic conduction in yttrium aluminum garnet

The ionic conductivity of YAG single crystals doped with a variety of impurities including Ce, Ni, Ni+Zr, Fe and Ca was studied and generally found to be P O 2-independent, fixed by acceptor impurities. In the case of Ni dopants, a P O 2-dependent ionic conductivity was also observed and associated...

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Veröffentlicht in:Solid state ionics 1990, Vol.40, p.893-895
Hauptverfasser: Rotman, S.R., Tuller, H.L.
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Physics
Transport properties of condensed matter (nonelectronic)
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Zusammenfassung:The ionic conductivity of YAG single crystals doped with a variety of impurities including Ce, Ni, Ni+Zr, Fe and Ca was studied and generally found to be P O 2-independent, fixed by acceptor impurities. In the case of Ni dopants, a P O 2-dependent ionic conductivity was also observed and associated with the valence change of Ni 3+ to Ni 2+. The activation energy for oxygen ion conduction ranged from 2.2 to 4.0 eV. Results are compared with diffusion data.
ISSN:0167-2738
1872-7689
DOI:10.1016/0167-2738(90)90146-I