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Surface Steps on Flux-Grown Alumina

Published online by Cambridge University Press:  02 July 2020

N. Ravishankar  and
C. Barry Carter
N. Ravishankar
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota 421 Washington Ave. SE, Minneapolis, MN , 55455-01432
C. Barry Carter
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota 421 Washington Ave. SE, Minneapolis, MN , 55455-01432
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Abstract

The utility of a surface to serve as a substrate depends upon its surface structure. The presence of steps on the surface affects the quality of the deposited material. The basal surface of alumina is one of the most widely used substrate materials and hence considerable effort has been directed towards the study of this surface. The mechanism of formation of a stepped structure on the basal surface of alumina has been investigated using atomic force microscopy. The evolution of steps on the basal surface as a function of temperature has been reported. Flux growth is an attractive route for producing alumina because of the low temperatures required for processing and the extremely low dislocation densities that can be obtained. in the present study, the structure of steps on flux-grown alumina has been investigated. Formation of low-index macrofacets as a result of crystal growth has been observed.

Type
Novel Microscopy Assisted Ceramic Developments in Materials Scienceand Nanotechnology (Organized by P. Gai and J. Lee)
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. 416 - 417
Copyright
Copyright © Microscopy Society of America 2001

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