Milling of Zirconia Nanoparticles in a Stirred Media Mill

Dispersions of three different types of zirconia nanoparticles were treated in a stirred media mill. The deployed surface modifier was present during milling and it established separating mechanisms between the particles. The combination of mechanical deagglomeration and chemical surface modificatio...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Ceramic Society 2008-09, Vol.91 (9), p.2836-2843
Main Authors: Adam, Jens, Drumm, Robert, Klein, Gabi, Veith, Michael
Format: Article
Language:English
Subjects:
Chemical synthesis methods
Chemistry
Colloidal state and disperse state
Colloids
Comminution
Cross-disciplinary physics: materials science
rheology
Crystallites
Deagglomeration
Dispersion
Exact sciences and technology
Fragments
General and physical chemistry
Joining
welding
Materials science
Materials synthesis
materials processing
Media
Methods of nanofabrication
Mills
Nanoparticles
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Physics
Transmission electron microscopy
Zirconium
Zirconium dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Dispersions of three different types of zirconia nanoparticles were treated in a stirred media mill. The deployed surface modifier was present during milling and it established separating mechanisms between the particles. The combination of mechanical deagglomeration and chemical surface modification results in stable zirconia colloids with average particle sizes down to 9 nm. In addition to deagglomeration, the milling treatment also causes comminution of nanoparticles. This was indicated for the two coarser types of the examined particles, by increasing surface areas and decreasing primary crystallite sizes. Transmission electron microscopy of the particles confirmed the creation of smaller primary crystallites and a minority of small fragments, but the majority of particles do not undergo comminution into halves or fragments with similar size. Changes of the particles' phase composition, wear of milling media, amorphization of the particles to a small extent, and leaching of Y2O3 dopant have been observed as side effects in the process and are characterized quantitatively. This work describes a process for nanoparticle deagglomeration and preparation of high quality colloids, and informs about occurring side effects, including approaches for their minimization.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2008.02579.x