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Fabrication and Characterization of MgO Bicrystals

Published online by Cambridge University Press:  21 February 2011

Michael Liberatore ,
B.J. Wuensch ,
I.G. Solorzano  and
J.B. Vander Sande
Michael Liberatore
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge, Massachusetts 02139
B.J. Wuensch
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge, Massachusetts 02139
I.G. Solorzano
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge, Massachusetts 02139
J.B. Vander Sande
Affiliation:
Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge, Massachusetts 02139
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Abstract

High purity bicrystals of MgO have been grown using chemical vapor transport for the purpose of studying oxygen grain boundary diffusion. Preliminary data indicate preferential diffusion of oxygen along ∑ 13 symmetric tilt boundaries. The measured grain boundary diffusivities were approximately 4 orders of magnitude higher than the corresponding bulk values. The activation energies for bulk and grain boundary diffusion were found to be equal to within experimental error, (≈3.9eV)

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References

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