Impact of Polymer Binders on the Structure of Highly Filled Zirconia Feedstocks.

The impact of polypropylene and high-density polyethylene backbone binders on the structure of organic matrix, feedstock, and ceramic parts is investigated in terms of morphology in this paper. The miscibility of wax with polyethylene and polypropylene is investigated in the molten state via a rheological study, revealing wax full miscibility with high-density polyethylene and restricted miscibility with polypropylene. Mercury porosimetry measurements realized after wax extraction allow the characterization of wax dispersion in both neat organic blends and zirconia filled feedstocks.

Control of particle morphology in the spray drying of colloidal suspensions.

Powders of nanoparticles are volatile, i.e. easily disperse in air, which makes their handling difficult.

Controlling the buckling instability of drying droplets of suspensions through colloidal interactions.

The present study focuses on the drying of droplets of colloidal suspensions using the Leidenfrost effect. At the end of drying, grains show different morphologies: cups or spheres depending on the ionic strength or zeta potential of the initial suspension. High ionic strengths and low absolute zeta potential values lead to spherical morphologies.