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Atomic Scale Analysis of Oxygen Vacancy Segregation At Grain Boundaries in Ceramic Oxides

Published online by Cambridge University Press:  02 July 2020

N. D. Browning ,
J. P. Buban ,
Y. Ito ,
R. F. Klie  and
Y. Lei
N. D. Browning
Affiliation:
University of Illinois at Chicago, Department of Physics (M/C 273), 845 W. Taylor St, Chicago, IL, 60607-7059, USA.
J. P. Buban
Affiliation:
University of Illinois at Chicago, Department of Physics (M/C 273), 845 W. Taylor St, Chicago, IL, 60607-7059, USA.
Y. Ito
Affiliation:
University of Illinois at Chicago, Department of Physics (M/C 273), 845 W. Taylor St, Chicago, IL, 60607-7059, USA.
R. F. Klie
Affiliation:
University of Illinois at Chicago, Department of Physics (M/C 273), 845 W. Taylor St, Chicago, IL, 60607-7059, USA.
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Abstract

The properties of ceramic oxides being developed for such varied applications as fuel cells, ionic transporting membranes, high-Tc superconductors, ferroelectrics and varistors are dominated by the presence of grain boundaries. Key to controlling the electronic properties of the grain boundaries in these materials is a fundamental understanding of the complex relationship between structure, composition and local electronic structure. The ability to characterize and directly correlate these parameters on the atomic scale is afforded by the combination of Z-contrast imaging and electron energy loss spectroscopy (EELS) in the scanning transmission electron microscope (STEM). Furthermore, the recent development of in-situ heating capabilities in the JEOL 201 OF STEM/TEM permits atomic resolution analysis to be performed at elevated temperatures and the interactions of grain boundaries with the oxygen vacancies determined.

Figure 1 shows an example of the type of experiment that can be performed using these methods.

Type
Quantitative Transmission Electron Microscopy of Interfaces (Organized by M. Rüehle, Y. Zhu and U. Dahmen)
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 308 - 309
Copyright
Copyright © Microscopy Society of America 2001

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References

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