Abstract
EPR measurements on yttria-doped tetragonal zirconia polycrystals (Y-TZP) were performed in order to study the modifications of the structure of the material following hydrothermal treatments. By X-ray irradiation of the samples, the structural defects near the oxygen vacancies were magnetically activated by electron trapping. Y2O3 aggregates were identified by EPR signals of defects of F+ type, coordinated with yttrium ions, and defects such as Y2+ (4d1) in four-fold coordination, randomly tetragonally distorted. The analysis of these defect sites, used as local probes, supports the existence of structural modification of the material and the formation of α-Y(OH)3 clusters.
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Azzoni, C.B., Paleari, A., Scardina, F. et al. EPR structural study on hydrothermally aged yttria-doped tetragonal zirconia polycrystals. JOURNAL OF MATERIALS SCIENCE 28, 3951–3956 (1993). https://doi.org/10.1007/BF00353204
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DOI: https://doi.org/10.1007/BF00353204