1991 Volume 17 Issue 2 Pages 387-394
Ultrafine particles have extremely large external surface area, strong adhesive and agglomeration forces, and a large bed voidage, exceeding 90%.
Ultrafine particles were packed by means of tapping, centrifugal and compression methods, and the distributions of voidage in the resulting beds were measured by X-ray computed tomography (X-ray CT).
The results of the measurements made clear the internal structure of the packed beds of ultrafine particles obtained by the above-mentioned methods as well as the characteristic distribution of voidage near theperiphery. It was also found that the packing characteristics depended on structural features of the constituent particles, such as chain-like structure and agglomerate structre.
