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Modifying the oxygen adsorption properties of YBaCo4O7 by Ca, Al, and Fe doping

  • Song Wang
  • Haoshan Hao
  • Baofeng Zhu
  • Jianfeng Jia
  • Xing Hu
Article

Abstract

The doping effect of Ca, Al, and Fe on the oxygen adsorption properties of YBaCo4O7 was investigated by thermogravimetry (TG) method. It was found that the original YBaCo4O7 oxygen adsorption properties can be modified greatly by Ca, Al, and Fe doping. Ca doping in Y sites eliminates the oxygen adsorption at low temperature (~300 °C) but the oxygen adsorption properties at high temperature is almost unchanged. Minor Al doping in Co sites eliminates the oxygen adsorption hump at high temperature, but the hump at low temperature is preserved. Fe appearance in YBaCo3Al1−x Fe x O7 seems to weaken the effect of Al doping, so the oxygen hump at high temperature emerges again. The doping effect was discussed based on elements valence, binding energy between cations and oxygen ions, and distortion of crystal structure.

Keywords

Y2O3 Oxygen Adsorption Lattice Stability Octahedra Form Zigzag Ribbon 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Song Wang
    • 1
  • Haoshan Hao
    • 2
    • 1
  • Baofeng Zhu
    • 1
  • Jianfeng Jia
    • 1
  • Xing Hu
    • 1
  1. 1.School of Physical Engineering and Material Physics LaboratoryZhengzhou UniversityZhengzhouChina
  2. 2.Department of Mathematical and Physical SciencesHenan Institute of EngineeringZhengzhouChina

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