Paper Title:
Spray Freeze Granulation of Nano Powders for Die Pressing
| Periodical | Advances in Science and Technology (Volume 63) |
|---|---|
| Main Theme | 12th INTERNATIONAL CERAMICS CONGRESS PART B |
| Edited by | Pietro VINCENZINI, Ralf RIEDEL, Alexander G. MERZHANOV and Chang-Chun GE |
| Pages | 1-6 |
| DOI | 10.4028/www.scientific.net/AST.63.1 |
| Citation | Jon Binner et al., 2010, Advances in Science and Technology, 63, 1 |
| Online since | October, 2010 |
| Authors | Jon Binner, Ketharam Annapoorani, Bala Vaidhyanathan |
| Keywords | Die Pressing, Nanopowder, Spray Freeze Drying |
| Price | US$ 28,- |
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Abstract
The processing of nanocrystalline yttria doped zirconia powder via dry forming routes has been investigated via the granulation of the powder using spray freeze drying (SFD). Free-flowing and crushable powders suitable for either die or isosatic pressing have been achieved via the combination of SFD with additions of up to 2 vol% of Freon 11; the latter reducing the strength of the granules whilst not affecting the powder flowability into the die. The approach has allowed relic-free green bodies of up to 55% of theoretical density to be produced using pressures as low as 250 MPa.
