Abstract
Available morphological analyses for fine particles are briefly reviewed. Three methods for characterizing morphology of alumina and hydrate are studied in some detail: shape factor by Optomax Image Analyzer, signature by sieve cascadography and Fourier method. The shape factor represents only a global deviation from a circle and does not fully reflect small scale protuberances on the particle profile. The sieve cascadography, when fully developed, can be a useful tool for shape characterization. The commercially implemented Fourier analysis provides information on both global and local shape features by its morphological descriptors which can be used for distinguishing various types of particles. An example is given in which a newly defined “blockiness index” from a combination of Fourier descriptors is used to identify and quantify the blocky alumina or hydrate crystals.
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© 2016 The Minerals, Metals & Materials Society
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Hsieh, H.P. (2016). Morphological Analysis of Alumina and its Trihydrate. In: Donaldson, D., Raahauge, B.E. (eds) Essential Readings in Light Metals. Springer, Cham. https://doi.org/10.1007/978-3-319-48176-0_101
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DOI: https://doi.org/10.1007/978-3-319-48176-0_101
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