High-pressure XAFS study of bulk and nano size ZrO2 particles

Akira Yoshiasa, Hiroshi Arima, Maki Okube, Hiroshi Fukui, Akihiko Nakatsuka, Yoshinori Katayama, Osamu Ohtaka

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

XAFS measurements near the Zr K-edge for the P21/c and Pbca ZrO2 phases with particle size of 62 nm and 0.50 μm were performed under pressure up to 7.8 GPa using a multi-anvil high-pressure device and synchrotron radiation at BL14B1, SPring-8, Hyogo. XANES spectra change gradually near the phase transition region of 3.0-4.8 and 4.8-7.8 for bulk and nano particles. The second-nearest Zr-Zr distance in nano particle is 0.02 longer than that in bulk particle. It was found that the nano particle is more compressible comparing with the bulk particle and transforms to the Pbca phase at certain specific Zr-O and Zr-Zr distances. The magnitudes of σ2 for Zr-Zr distance in the nano particle are significantly larger because of the static disorder near the surface.

Original languageEnglish
Article number012119
JournalJournal of Physics: Conference Series
Volume190
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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