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Density Measurements of Single Granules Using the Atomic Force Microscope

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Abstract:

The density of single spray-dried granules has been determined with a new method based on atomic force microscopy (AFM). Spherical granules with a well-defined diameter are attached to the AFM cantilever, which acts as a beam-type spring, and the mass of a granule is estimated from the shift in the resonant frequency. The error of the measurements associated with the method was estimated to vary between 1% and 5%, depending on the size and shape of the granule. Density measurements of spray-dried WC–Co granules are presented, and the effect of a polymeric binder and dispersant on the consolidation during drying is discussed.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2005.00419.x

Affiliations: YKI, Institute for Surface Chemistry, SE-114 86 Stockholm, Sweden

Publication date: August 1, 2005

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