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Title: Atomic-Scale Structure of Al2O3-ZrO2 Mixed Oxides Prepared by Laser Ablation

Abstract

By means of x-ray diffractometry (XRD) and X-ray absorption fine structure spectroscopy, the phase composition and atomic structure of laser evaporated ZrO2 and ZrO2-Al2O3 nanopowders have been studied. The results indicate that pure ZrO2 exists in the form of tetragonal structure, Al2O3 doped ZrO2 nanoparticles, however, have cubic structure. Compared to bulk tetragonal ZrO2, pure tetragonal ZrO2 nanoparticles have a shorter Zr-O- and Zr-Zr shell, indicating that the lattice contracts with decreasing particle size. For Al2O3 doped ZrO2 solid solution, the distances of first Zr-O and Zr-Zr (Al) coordination decrease with increasing solid solubility. The disorder degree of the ZrO2 lattice increases with increasing solid solubility. The coevaporated ZrO2-Al2O3 is quickly solidified into amorphous phase when it is ablated in a higher pressure. The amorphous phase contains Zr-O-Zr (Al) clusters and has shorter Zr-O distance and tower Zr-O coordination number.

Authors:
 [1];  [2];  [3];  [4]
  1. College of Materials Science and Engineering, Tongji University, Shanghai 200092 (China)
  2. Department of Physics, Martin Luther University of Halle, D-06108 Halle (Germany)
  3. Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle (Germany)
  4. Department of Materials Science and Engineering, Clausthal University of Technology (Germany)
Publication Date:
OSTI Identifier:
21054682
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 882; Journal Issue: 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644593; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABLATION; ABSORPTION SPECTROSCOPY; ALUMINIUM OXIDES; AMORPHOUS STATE; COORDINATION NUMBER; CRYSTAL STRUCTURE; DOPED MATERIALS; FINE STRUCTURE; NANOSTRUCTURES; PARTICLE SIZE; PARTICLES; SOLID SOLUTIONS; SOLIDS; SOLUBILITY; X-RAY DIFFRACTION; X-RAY SPECTRA; X-RAY SPECTROSCOPY; ZIRCONIUM OXIDES

Citation Formats

Yang Xiuchun, Dubiel, M., Hofmeister, H., and Riehemann, W.. Atomic-Scale Structure of Al2O3-ZrO2 Mixed Oxides Prepared by Laser Ablation. United States: N. p., 2007. Web. doi:10.1063/1.2644593.
Yang Xiuchun, Dubiel, M., Hofmeister, H., & Riehemann, W.. Atomic-Scale Structure of Al2O3-ZrO2 Mixed Oxides Prepared by Laser Ablation. United States. doi:10.1063/1.2644593.
Yang Xiuchun, Dubiel, M., Hofmeister, H., and Riehemann, W.. Fri . "Atomic-Scale Structure of Al2O3-ZrO2 Mixed Oxides Prepared by Laser Ablation". United States. doi:10.1063/1.2644593.
@article{osti_21054682,
title = {Atomic-Scale Structure of Al2O3-ZrO2 Mixed Oxides Prepared by Laser Ablation},
author = {Yang Xiuchun and Dubiel, M. and Hofmeister, H. and Riehemann, W.},
abstractNote = {By means of x-ray diffractometry (XRD) and X-ray absorption fine structure spectroscopy, the phase composition and atomic structure of laser evaporated ZrO2 and ZrO2-Al2O3 nanopowders have been studied. The results indicate that pure ZrO2 exists in the form of tetragonal structure, Al2O3 doped ZrO2 nanoparticles, however, have cubic structure. Compared to bulk tetragonal ZrO2, pure tetragonal ZrO2 nanoparticles have a shorter Zr-O- and Zr-Zr shell, indicating that the lattice contracts with decreasing particle size. For Al2O3 doped ZrO2 solid solution, the distances of first Zr-O and Zr-Zr (Al) coordination decrease with increasing solid solubility. The disorder degree of the ZrO2 lattice increases with increasing solid solubility. The coevaporated ZrO2-Al2O3 is quickly solidified into amorphous phase when it is ablated in a higher pressure. The amorphous phase contains Zr-O-Zr (Al) clusters and has shorter Zr-O distance and tower Zr-O coordination number.},
doi = {10.1063/1.2644593},
journal = {AIP Conference Proceedings},
number = 1,
volume = 882,
place = {United States},
year = {Fri Feb 02 00:00:00 EST 2007},
month = {Fri Feb 02 00:00:00 EST 2007}
}
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