Control of the particle size distribution of fabricated alumina nanoparticles from general alumina powder with a large geometric standard deviation (GSD) was studied. A thermophoretic separator was used to control the GSD of the nanoparticles, and unevaporated and primary particles were separated to yield a small GSD. The fabricated nanoparticles were characterized by field emission scanning electron microscopy (FESEM) and a scanning mobility particle sizer (SMPS). We confirmed that the GSD of the nanoparticles was controlled by the thermophoretic separator. A temperature difference between 79 K and 151 K was applied to the thermophoretic separator for control of the nanoparticle GSD. The GSD of the fabricated alumina nanoparticles was improved from 1.74 to 1.44.
Bibliographical noteFunding Information:
This work was supported by the project “Development of Passive Heat-Controllable Multi-layer Panel Combining Porous Nanoparticle Vacuum Insulation and Heat (Project number: EO190020),” funded by KITECH in the South Korea Agency.
© 2019 The Society of Powder Technology Japan
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Mechanics of Materials