Synchrotron Radiation Ti‐k XANES Study of TiO2─Y2O3‐Stabilized Tetragonal Zirconia Polycrystals

verfasst von
Ehrenfried Zschech, Paris N. Kountouros, Günter Petzow, Peter Behrens, Alex Lessmann, Ronald Frahm
Abstract

Valence state and site symmetry of Ti ions in TiO2–Y2O3–ZrO2 powders with 2 mol% Y2O3 and 5, 10, 15, and 20 mol% TiO2, respectively, are studied by X‐ray absorption near‐edge spectroscopy (XANES). Tetravalent Zr4+ ions are replaced predominantly by Ti4+ ions. Within the solubility region of Ti ions, a subsequent displacement of Ti ions from the center of symmetry is observed with increasing TiO2 content in TiO2–Y2O3‐stabilized tetragonal ZrO2 polycrystals (Ti‐Y‐TZP) under investigation. This behavior cannot be interpreted with a random substitution of Ti4+ ions on Zr4+ lattice sites. On the contrary, this correlation between the TiO2 content in Ti‐Y‐TZP and the shift of Ti ions indicates an increasing interaction between the Ti ions with growing TiO2 content, caused by a subsequent clustering of Ti ions.

Externe Organisation(en)
Max-Planck-Institut für Intelligente Systeme (Stuttgart)
Universität Konstanz
Deutsches Elektronen-Synchrotron (DESY)
Typ
Artikel
Journal
Journal of the American Ceramic Society
Band
76
Seiten
197-201
Anzahl der Seiten
5
ISSN
0002-7820
Publikationsdatum
01.1993
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Keramische und Verbundwerkstoffe, Werkstoffchemie
Elektronische Version(en)
https://doi.org/10.1111/j.1151-2916.1993.tb03707.x (Zugang: Geschlossen)