Changes in X-ray photoelectron spectra of yttria-tetragonal zirconia polycrystal by ion sputtering

Abstract

This paper reports changes in X-ray photoelectron spectroscopy spectra of yttria-tetragonal zirconia polycrystal (Y-TZP) brought about by Ar ion sputtering. The changes in the core-level spectra of Y-TZP suggest that preferential sputtering of oxygen occurred. A new peak was observed near 0 eV binding energy accompanied with changes in the corelevel spectra by the sputtering. After 18 h in a high vacuum following the sputtering, the spectra changed by the sputtering were returned to their original shapes. In contrast, the color of Y-TZP was changed from white to pale brown by X-ray irradiation and was changed from pale brown to dark gray by ion sputtering. However, when the new peak near 0 eV decreased after 18 h, no color change was observed. Therefore, it is thought that the new peak was mainly derived from electrons trapped in various kinds of oxygen vacancies created by the sputtering in other than color centers.

Physicochemical properties and cytocompatibility assessment of non-degradable scaffolds for bone tissue engineering applications

“…Each crystallographic phase can develop during heating or cooling processes. As we can observe in 4-1 the ZrO 2 XRD plot presents a typical tetragonal phase plot, indicating that the ZrO 2 materials used during this study were stable and is in agreement with published data related to the tetragonal phase of ZrO 2 (Tsunekawa et al, 2005;Watanabe and Yoshinari, 2016). For the chemical composition, XPS analyzed were performed.…”

“…For the chemical composition, XPS analyzed were performed. The peaks of Ti, Zr, C and O were identified, as expected and reported elsewhere (Tsunekawa et al, 2005;Watanabe and Yoshinari, 2016;Shard and Badyal, 1992;Lu et al, 2015).…”

pH-responsive lyotropic liquid crystals for the preparation of pure cubic zirconia nanoparticles

“…Zirconia (ZrO 2 ) is widely used in various advanced structural ceramics [1], electronic devices [2], and high-temperature ceramics because of its low thermal conductivity [3], high mechanical strength, and relatively high thermal expansion coefficient [4]. ZrO 2 exists in three main polymorphic phases [5], namely, tetragonal, monoclinic, and cubic.…”