Ionic conduction in yttrium aluminum garnet Academic Article uri icon

abstract

  • Abstract 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 PO 2- independent, fixed by acceptor impurities. In the case of Ni dopants, a PO 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.

publication date

  • January 1, 1990