Electronic conductivity of In2O3 solid solutions with ZrO2

Article abstract of DOI:10.1149/1.2059204

The electrical conductivity of In₂O₃-ZrO₂ as well as In₂O₃ solid solutions doped with SnO₂, CeO₂, Nb₂O₅, Pr₆O₁₁, and MgO is investigated, in the temperature range between room temperature and 1300°C, and in the oxygen partial pressure range between 5 × 10^-5 and 1 atm. In₂O₃ doped with ZrO₂ is an electronic conductor, while ZrO₂ doped with In₂O₃ is an oxygen-ionic conductor. The two-phase material of the cubic (fcc) ZrO₂ + cubic (bcc) In₂O₃ solid solutions is a 3-dimensional composite of ionic and electronic conductors. The single-phase In₂O₃ doped with ZrO₂ is an electronic conductor with a conductivity up to 7 × 10⁴ Sm^-1 in air. Two maxima in electrical conductivity are found, one in the two-phase region and one in the In₂O₃ single-phase region. Lattice defects responsible for electronic conduction in pure and doped In₂O₃ are discussed. The defect models for In₂O₃ doped with ZrO₂ are proposed, and the Kroger-Vink diagram is constructed. The metastable solubility of dopants in In₂O₃ due to the slow phase separation kinetics influences the electronic conductivity. ZrO₂ is a most effective donor for increasing electronic conductivity of In₂O₃, among hypervalent metal oxides including SnO₂, Nb₂O₅, and CeO₂.

Full text of DOI:10.1149/1.2059204

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Downloaded on 2014-03-27 to IP 140.120.135.222 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-03-27 to IP 140.120.135.222 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-03-27 to IP 140.120.135.222 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-03-27 to IP 140.120.135.222 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-03-27 to IP 140.120.135.222 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-03-27 to IP 140.120.135.222 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-03-27 to IP 140.120.135.222 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-03-27 to IP 140.120.135.222 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).