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Preparation of Y-doped zirconia by emulsion technique

: Rinn, G.; Schmidt, H.

Deutsche Keramische Gesellschaft e.V. -DKG-:
Ceramic Powder Processing Science
Bad Honnef, 1989
International Conference of Ceramic Powder Processing Science <2, 1988, Berchtesgaden>
Conference Paper
Fraunhofer ISC ()
ceramic powder; powder processing; zirconia powder

Spherical Y-doped zirconia powders have been prepared from water in oil-emulsions of acid stabilized aqueous sols. The precipitation of hydroxides inside the droplets was achieved by an ion exchange process between the aqueous phase and an anion exchange resin, using a phase transfer catalyst as a carrier for the anions through the organic solvent. Azeotropic distillation of the water caused a densification to spherical amorphous particles. Filtration, drying and calcination led to the formation of a tetragonal zirconia powder. Isostatically pressed powder compacts sintered at 1650 degree C to theoretical density.