Characterization of powder flow properties from micron to nanoscale using FT4 powder rheometer and PT-X powder tester
Source abstract
Abstract
The rapid development of nanotechnology has led to a need to further understand the physical characteristics of nanoparticles. In this paper, the flow characteristics of micro-nano alumina particles with different particle sizes were characterized. The FT4 powder rheometer and the PT-X powder tester were used to measure the compression, friction, and dynamic properties of powders. Powder compressibility increased significantly as the particle size decreased from 27 μm to 30 nm. Pressure distribution in the silo was measured and predicted by Janssen`s theory, with errors mostly less than 10%. The basic flow energy and the specific energy of the three powders were 4983, 1734, and 244 mJ, and 6.80, 11.70, and 6.70 mJ/g, respectively, indicating that there was no linear relationship between the change in flowability and particle size. The dynamic properties of the powders change from particle-dominated to agglomeration-dominated as the particle size decreases. The conclusion is supported by the results of field emission scanning electron microscopy.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Granular flow and fluidized beds · Particle Dynamics in Fluid Flows · Fluid Dynamics and Heat Transfer
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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