Electrtic Transport Properties and the Size Effect
in ZrO₂-Based Ceramic Materials

V. B. Glushkova^a, V. P. Popov^a, P. A. Tikhonov^a, L. I. Podzorova^b, and A. A. Il’icheva^b

^a Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
ul. Odoevskogo 24/2, St. Petersburg, 199155 Russia

^b Institute of Physicochemical Problems in Ceramic Materials, Russian Academy of Sciences, Moscow, Russia

Received November 18, 2005

Abstract—Amorphous nanomaterials in the ZrO₂–CeO₂ system are synthesized. The aging and crystallization
processes in a complex zirconium–cerium hydrogel are investigated. Powders with a crystal size of 45–100 nm
are prepared. Samples having a porosity of less than 2.2% are produced from the powders. It is demonstrated
that tetragonal zirconia-based solid solutions Zr_1–xCe_xO_2– sintered at a temperature of 1500°C possess ionic
conductivity in air and in noble gasses. The assumptions are made regarding the mechanisms of ionic (surface
anionic) and electronic (hopping) conduction in samples of the 88ZrO₂ · 12CeO₂ (mol %) composition. The
solid solutions prepared can be used at a temperature of 720°C as high-strength inexpensive solid electrolytes.

DOI: 10.1134/S1087659606050142

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