Nano Archive

High-pressure XAFS study of bulk and nano size ZrO 2 particles

Yoshiasa, Akira and Arima, Hiroshi and Okube, Maki and Fukui, Hiroshi and Nakatsuka, Akihiko and Katayama, Yoshinori and OsamuOhtaka, (2009) High-pressure XAFS study of bulk and nano size ZrO 2 particles. Journal of Physics: Conference Series, 190 (1). 012119.

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XAFS measurements near the Zr K-edge for the P2 1 /c and Pbca ZrO 2 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 Å 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.

Item Type:Article
ID Code:11300
Deposited By:Prof. Alexey Ivanov
Deposited On:01 Nov 2011 23:31
Last Modified:02 Nov 2011 00:47

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