Ionic and Electronic Conductivity of (Ho0.9Ca0.1)2Ti2O6.9 Pyrochlore

Stanislav Savvin; Dimitry Belov; Anna Shlyakhtina; Lidia Shcherbakova; Juan Carlos Ruiz-Morales; Pedro Núñez

doi:10.1149/1.3205830

ECS Transactions

Ionic and Electronic Conductivity of (Ho_0.9Ca_0.1)₂Ti₂O_6.9 Pyrochlore

Stanislav Savvin¹, Dimitry Belov², Anna Shlyakhtina³, Lidia Shcherbakova³, Juan Carlos Ruiz-Morales⁴ and Pedro Núñez⁵

© 2009 ECS - The Electrochemical Society
ECS Transactions, Volume 25, Number 2 Citation Stanislav Savvin et al 2009 ECS Trans. 25 2699 DOI 10.1149/1.3205830

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Author affiliations

¹ University of La Laguna

² Department of Chemistry, Moscow State University

³ Semenov Institute of Chemical Physics, Russian Academy of Sciences

⁴ Universidad de La Laguna

⁵ Dpto. Química Inorgánica. Universidad de La Laguna. Tenerife-Spain

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Abstract

Partial electronic conductivity of (Ho_0.9Ca_0.1)₂Ti₂O_6.9 was determined at 750-900C by Hebb-Wagner polarization and reoxidation methods. The ion transference number in air was estimated to vary from 0.991 at 750C to 0.979 at 900C. The activation energies of the electron and hole conductivity at P(O₂)=1 atm were calculated to be 2.95 eV and 1.34 eV respectively.

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