Comparison of freeze drying and spray drying to obtain porous nanostructured granules from nanosized suspensions
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7033
comunitat-uji-handle3:10234/8618
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INVESTIGACIONMetadata
Title
Comparison of freeze drying and spray drying to obtain porous nanostructured granules from nanosized suspensionsAuthor (s)
Date
2012Publisher
ElsevierISSN
0955-2219Type
info:eu-repo/semantics/articlePublisher version
http://www.sciencedirect.com/science/article/pii/S0955221911006261Version
info:eu-repo/semantics/acceptedVersionSubject
Abstract
This work studies the spray drying and freeze drying of different nanosized ceramic materials and the physicochemical characteristics of the obtained granules. Colloidal suspensions of alumina, titania, and a 87/13 ... [+]
This work studies the spray drying and freeze drying of different nanosized ceramic materials and the physicochemical characteristics of the obtained granules. Colloidal suspensions of alumina, titania, and a 87/13 mixture were studied. The influence of temperature, pressure, nozzle diameter, and solids loading on the morphology and characteristics of dried granules were evaluated. It was demonstrated that these processing parameters have practically no influence, and the only parameter determining the granules characteristics is the solids content of the suspensions, in both processes. Spray drying leads to a monomodal distribution with higher granule size, while freeze drying produces more porous granules, with a bimodal intragranular distribution. The flowability of spray-dried powder is better than that of the freeze-dried powder and suit better the requirements of a feedstock targeted to obtain coatings by plasma thermal spraying whereas freeze drying can produce high porosity, softer granules [-]
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Journal of the European Ceramic Society, 32, 5Rights
© 2012 Elsevier Inc. All rights reserved
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info:eu-repo/semantics/openAccess
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info:eu-repo/semantics/openAccess
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