FlowCam - Flow Imaging Microscopy Blog

Why FlowCam for Micronized Diamonds?

A manufacturer of micronized diamonds used the FlowCam to ensure a new batch met their desired specifications – at least 95% of the diamond particles needed to have a uniform, smooth perimeter.


The image above shows the FlowCam results. The upper graphs are the frequency and volume distributions, which show a typical Gaussian size distribution with a mean Equivalent Spherical Diameter (ESD) of 21.54 µm. The aspect ratio (width/length) scattergram in the lower left, however, indicates that the particles are not uniform in shape.

Using VisualSpreadsheet it was easy to separate and display the particles of different shape. In the below image, both sets of particles have an ESD around the mean, but different degrees of smoothness around their perimeters. The set on the left have a relatively smooth perimeter with rounded edges, whereas the set on the right are more angular. However, the percentage of angular particles was automatically shown to be less than 5%, so this batch of diamonds met the set specification.


The manufacturer was quickly and easily able to evaluate the quality of this batch of micronized diamonds using the FlowCam. To reach the same, statistically-significant conclusion using a microscope would have taken hours, if not days to complete.

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Topics: Industrial Applications, Abrasives