Environmentally benign dry mechanical mixing of nano-particles using magnetically assisted impaction mixing process

Document Type

Article

Publication Date

5-15-2011

Abstract

The effectiveness of magnetically assisted impaction mixing (MAIM), an environmentally benign mechanical process, in mixing SiO2+TiO2 and SiO2+Al2O3 nanoparticle mixtures has been examined. Experiments were carried out at different magnet-to-sample weight ratios, processing times, and magnet sizes. The homogeneity of mixing (HoM) was evaluated at the micron scale using field-emission scanning electron microscopy and energy dispersive X-ray spectroscopy, and at sub-micron scale through electron energy loss spectroscopy and transmission electron microscopy. The HoM improved with an increase in the magnet-to-sample weight ratio and processing time, and a decrease in the magnet size; over the range of conditions tested, the HoM was found to depend on the product of processing time and the number of magnets per unit powder mass. Optimized MAIM process achieved HoM values that were comparable to those attained with Rapid Expansion of Supercritical or High-Pressure Suspensions and sonication of a suspension of the nanoparticles in supercritical CO2. © 2011 Elsevier B.V.

Identifier

79953030152 (Scopus)

Publication Title

Powder Technology

External Full Text Location

https://doi.org/10.1016/j.powtec.2011.02.021

ISSN

00325910

First Page

138

Last Page

146

Issue

1-3

Volume

209

Grant

DMI-0210400

Fund Ref

National Science Foundation

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