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MICROANALYSIS OF POLYTYPOID CERAMICS BY IMAGING, DIFFRACTION AND SPECTROSCOPY

Kannan M. Krishnan,G. Thomas-1987-02-01-University of North Texas Digital Library (University of North Texas)
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TL;DRAbstract

Combined atomic resolution imaging, microdiffraction and energy dispersive x-ray microanalysis suggest that the 32H polytypoid in the AlN-Al/sub 2/O/sub 3/ pseudobinary system is in fact a 7:9 periodic intergrowth of the 21R and 27R polytypoids. Furthermore, these combined techniques verify that the cation/anion ratio is 16/17 and that this ratio defines the polytypoid precisely.

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Combined atomic resolution imaging, microdiffraction and energy dispersive x-ray microanalysis suggest that the 32H polytypoid in the AlN-Al/sub 2/O/sub 3/ pseudobinary system is in fact a 7:9 periodic intergrowth of the 21R and 27R polytypoids. Furthermore, these combined techniques verify that the cation/anion ratio is 16/17 and that this ratio defines the polytypoid precisely.

Keywords

MicroanalysisSpectroscopyDiffractionMaterials scienceCeramicMineralogyAnalytical Chemistry (journal)Resolution (logic)

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