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Microstructural development of ZnO using a rate-controlled sintering dilatometer

Published online by Cambridge University Press:  31 January 2011

Gaurav Agarwal,
Robert F. Speyer and
Wesley S. Hackenberger
Gaurav Agarwal
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332
Robert F. Speyer
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332
Wesley S. Hackenberger
Affiliation:
Center for Dielectric Studies, Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
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Abstract

Rate-controlled sintering (RCS) of isostatically pressed particulate compacts of ZnO showed lower average grain sizes and intragranular pore densities than constant heating rate temperature controlled sintering. Valid comparisons of this form could only be made after corrections to hardware and software which reduced specimen creep under dilatometer pushrod load, nonuniform pushrod expansion, reproducible specimen temperature determination, thermal expansion during sintering, and instantaneous termination of sintering at the specified end of RCS. The improved microstructures from RCS were attributed to maximized efficiency of densification, optimizing the time and temperatures permitted for grain growth.

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Type
Articles
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Journal of Materials Research , Volume 11 , Issue 3 , March 1996, pp. 671 - 679
Copyright
Copyright © Materials Research Society 1996

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References

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