, 15:183 | Cite as

ΔThe effect of co-doping on the yttrium local environment and ionic conductivity of yttria-stabilised zirconia

Original Paper


The effect of co-doping yttria-stabilised zirconia with calcia and scandia has been investigated. Changes in the yttrium ion local environment have been monitored using solid-state magic angle sample spinning 89Y nuclear magnetic resonance. The effect on the low-temperature (below 320 °C) bulk ionic conductivity has been observed using AC impedance spectroscopy. It was found that the number of oxygen vacancies in the nearest-neighbour sites to yttrium ions decreased on co-doping with scandia, correlating with an increase in conductivity, but increased on co-doping with calcia, correlating with a decrease in conductivity. This behaviour can be explained by proposing the trapping of oxygen vacancies in the nearest-neighbour yttrium ion sites so that they no longer contribute to the conduction mechanism.


Co-doping Stabilised zirconia Ordering 



RJD would like to acknowledge funding from UK EPSRC.


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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Department of Materials Science & MetallurgyUniversity of CambridgeCambridgeUK
  2. 2.Department of Earth SciencesUniversity of CambridgeCambridgeUK

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