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Abstract

Zirconia powders were produced from aqueous solutions of various zirconium salts dispersed as water-in-oil emulsions. Precipitation was induced by bubbling ammonia gas through the emulsion. Each droplet in the emulsion acted as an individual chemical reactor thereby ensuring the uniformity of the precipitate on a microscale. The characteristics of powders prepared from different precursor solutions and using various precipitate drying techniques were investigated. The nitrate, chloride, and sulphate of zirconium were used as precursors. Powders were dried by distillation, oven-drying, and freeze-drying. The morphology and microstructure were characterised by SEM, TEM, HREM and XRD, and the compaction characteristics were measured. The precursor solution strongly influenced the primary crystallite size and the tetragonal to monoclinic phase transformation, whereas the drying method influenced the compaction behaviour.

Additional information

Authors: PICKERING S, JRC Petten (NL);MCGARRY D, JRC Petten (NL);DJURICIC B, JRC Petten (NL)
Bibliographic Reference: Paper presented: Third European Ceramic Society Conference, Madrid (ES), September 13-17, 1993
Availability: Available from (1) as Paper EN 37488 ORA
Record Number: 199310712 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en
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