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Title: Comparison of spray freeze dried nanozirconia granules using ultrasonication and twin-fluid atomisation
Authors: Zhang, Yifei
Binner, J.G.P.
Rielly, Chris D.
Vaidhyanathan, Bala
Keywords: Nanostructure
Spray freeze drying
Dry pressing
Issue Date: 2014
Publisher: © Elsevier Ltd.
Citation: ZHANG, Y. ...et al., 2014. Comparison of spray freeze dried nanozirconia granules using ultrasonication and twin-fluid atomisation. Journal of the European Ceramic Society, 34(4), pp. 1001-1008.
Abstract: Granulation of nanostructured 3. mol% yttria stabilised zirconia using spray freeze drying was investigated to achieve flowable and crushable granules for subsequent die pressing. Commercial nanosuspension consisting of ~16. nm particles was concentrated to ~55. wt% solids content via a patented technique, followed by spraying into liquid nitrogen using either a vibrating ultrasonic probe or a twin-fluid atomizer and freeze dried to yield spherical granules. Control of the granule size fractions was investigated by changing the amplitude and the feeding rate of the nanosuspension during ultrasonication, whilst the flow rate of compressed air used for spraying was varied during twin-fluid atomisation. Granules retaining good crushability for pressing were in a size range of 125-250. μm, which were achieved with ~60. wt% yields using the atomisation route, whilst a maximum of 35. wt% of granules in this size range were produced in previous research using ultrasonication. © 2013 Elsevier Ltd.
Description: This paper was accepted for publication in the journal Journal of the European Ceramic Society and the definitive published version is available at: http://dx.doi.org/10.1016/j.jeurceramsoc.2013.10.033
Version: Accepted for publication
DOI: 10.1016/j.jeurceramsoc.2013.10.033
URI: https://dspace.lboro.ac.uk/2134/19337
Publisher Link: http://dx.doi.org/10.1016/j.jeurceramsoc.2013.10.033
ISSN: 0955-2219
Appears in Collections:Published Articles (Materials)

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