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Flat interfaces in zinc oxide-based varistor ceramics

Published online by Cambridge University Press:  31 January 2011

Gun Yong Sung ,
Stuart McKernan  and
C. Barry Carter
Gun Yong Sung*
Affiliation:
Department of Materials Science and Engineering, Bard Hall, Cornell University, Ithaca, New York 14853
Stuart McKernan*
Affiliation:
Department of Materials Science and Engineering, Bard Hall, Cornell University, Ithaca, New York 14853
C. Barry Carter*
Affiliation:
Department of Materials Science and Engineering, Bard Hall, Cornell University, Ithaca, New York 14853
*
a)Present address: Advanced Technology Department, Electronics and Telecommunications Research Institute, P.O. Box 8, Daeduk Science Town, Daejeon, 302-350, Korea.
b)Present address: Department of Chemical Engineering and Materials Science, Amundson Hall, University of Minnesota, Minneapolis, Minnesota. Address correspondence to C. Barry Carter.
b)Present address: Department of Chemical Engineering and Materials Science, Amundson Hall, University of Minnesota, Minneapolis, Minnesota. Address correspondence to C. Barry Carter.
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Abstract

Four types of structurally different, flat interfaces have been observed in ZnO-based varistor ceramics containing metal-oxides additives (Bi, Mn, and Ti) by bright-field and high-resolution imaging in a transmission electron microscope. Orientation relationships have been characterized by selected-area diffraction. The faceting of ZnO grains when in contact with β–Bi2O3 is discussed in relation to the anisotropic growth of the ZnO grains which leads to pronounced faceting parallel to (0001) planes.

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Articles
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Journal of Materials Research , Volume 7 , Issue 2 , February 1992 , pp. 474 - 481
Copyright
Copyright © Materials Research Society 1992

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