Defect Structure of Nanosized Zirconium Oxide Powders Doped with Y₂O₃, Sc₂O₃, Cr₂O₃

Abstract:

The formation mechanisms of paramagnetic centers originating from Zr³⁺ and Cr³⁺ ions and the influence of the nanoparticle composition on thermal generation processes of these paramagnetic centers in ZrO₂ structure were studied by electron paramagnetic resonance. A set of nanosized zirconium oxide powders (nominally pure ZrO₂, ZrO₂ doped with correspondingly Y₂O₃ and Sc₂O₃, Cr₂O₃ and Y₂O₃, as well as Cr₂O₃) was investigated: The influence of annealing on the EPR lines of Zr³⁺ and Cr⁵⁺ ions was found to be different. Annealing curves of EPR signals caused by Cr⁵+ ions have a maximum in temperature range 500–600 °C. Mechanisms of Zr³⁺ and Cr⁵⁺ ions formation were discussed.

• Periodical: Solid State Phenomena (Volume 200)
• Pages: 108-113
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.200.108
• Online since: April 2013
• Authors: Lesya P. Yurchenko, Igor P. Bykov, Alexander B. Brik, Oleksandr D. Vasylyev, Valeriy G. Vereschak, Gunnar Suchaneck, Lubomir Jastrabik, Alexandr Dejneka
• Keywords: Defect, Electron Paramagnetic Resonance (EPR), Impurity, Nanosized Powder, Nuclear Magnetic Resonance

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