Oxidation state of Fe and Ti ions implanted in yttria-stabilized zirconia studied by XPS |
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| Authors: | B A van Hassel A J Burggraaf |
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| Institution: | (1) Laboratory for Inorganic Chemistry, Materials Science and Catalysis, Department of Chemical Technology, University of Twente, P.O. Box 217, NL-7500 AE Enschede, The Netherlands |
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| Abstract: | The oxidation state of Fe and Ti ions implanted in yttria stabilized zirconia (YSZ) was studied by XPS (X-ray photoelectron spectroscopy) in combination with depth profiling using Ar+ sputtering. In the  as-implanted state of the sample Fe was found to be present as Fe3+, Fe2+ and as metallic Fe0. This is in agreement with earlier conversion electron Mössbauer Spectroscopy measurements. For Ti-implanted YSZ in the as-implanted state the majority of the Ti is present as Ti4+, Ti3+, and Ti2+ ions, while a part of the Zr cations is present in the divalent oxidation state (Zr2+). After oxidation in air, the Fe and Ti ions are present only in the valence three and four oxidation states, respectively. |
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| Keywords: | 79 60 Eq 61 70 Tm |
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