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Spatial Correlation of Elemental Impurities and Charge Contrast Image Detail in Gibbsite

Published online by Cambridge University Press:  02 July 2020

Travis C Baroni ,
Brendan J Griffin  and
Frank J Lincoln
Travis C Baroni
Affiliation:
Department of Chemistry, The University of Western Australia, Nedlands, W.A.6907.
Brendan J Griffin
Affiliation:
Western Australian Centre for Microscopy And Microanalysis, The University of Western Australia, Nedlands, W.A.6907.
Frank J Lincoln
Affiliation:
Department of Chemistry, The University of Western Australia, Nedlands, W.A.6907.
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Extract

Charge Contrast Imaging (CCI), is a recently reported technique allowing the imaging of the internal microstructure of non and poorly conductive materials. In previous work, the relationship between controlled growth events in batch-precipitated gibbsite, Al(OH)3 and the appearance of contrasting bands in CCIs has been empirically correlated. The data presented was spatial, based on the number and dimensions of growth rings, however no interpretation of the contrast variation was made. Suggestions that the contrast may be related to charge trapping, which in turn is related to conductivity pathways and impurity concentrations indicates that the technique may provide insight into crystallisation processes. The current work examines the spatial distribution of impurity elements and their effect on the contrast observed within growth layers in charge contrast images of gibbsite.

Analyses for Ca, Fe and Si, the main impurities in the solutions before and after precipitation indicate a preferential partitioning of Ca and to a lesser extent Si and Fe into gibbsite.

Type
Environmental Scanning Electron Microscopy and Other Wet Work
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 270 - 271
Copyright
Copyright © Microscopy Society of America

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References

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