Surface properties of Co-γFe2O3particles for digital recording |
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| Authors: | Cavallotti PL Nobili L Garbarino S Terrenzio E Visigalli P |
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| Affiliation: | Dipartimento Chimica Fisica Appl., Politecnico, Milan; |
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| Abstract: | Commercial cobalt-iron-oxide particles for digital applications have been examined by several techniques: physisorption, mercury porosimetry, and electron microscopy. Surface properties, in particular acicularity and heterogeneity, are related to the rheological behavior of the powders, to their magnetic characteristics, to the characteristics of draw-down coatings, and to the response of experimental floppy disks at predetermined recording frequencies. Particles showing high and uniform dispersibility have a narrow particle size distribution and a relatively large number of high-energy sites |
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