Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Gunter Rinn

Rudiger Nass

A novel process is described for the preparation of monodisperse ceramic ders wherein particulate oxides or hydroxides are obtained by reaction of hydrolysable compounds with water. The reaction is carried out in the presence of a complexing agent and, optionally, a stabilizer.

Process for the preparation of monodisperse ceramic powders

A process is described for the preparation of a suspension containing sph-shaped oxide particles, in which process there is emulsified in an organic liquid an aqueous phase containing at least one element which can be precipitated as an oxide (hydrate) in dissolved form or in the form of a sol. In this process there is dissolved in this organic liquid before, during or after formation of the emulsion at least one compound which acts as a phase transfer catalyst, and which can replace the anions or cations present in the emulsified water droplets by hydroxide ions or protons and which can thereby cause precipitation of the oxide in the droplets.

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Zellingen, Germany

Gunter Rinn