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Effect of mechanical vibration on the size and microstructure of titania granules produced by auto-granulation

Ku, N, Hare, C, Ghadiri, M, Murtagh, M and Haber, RA (2015) Effect of mechanical vibration on the size and microstructure of titania granules produced by auto-granulation POWDER TECHNOLOGY, 286. pp. 223-229.

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Abstract

Auto-granulation is the growth of particle clusters within a dry, fine powder bed due to the bulk powder cohesion. This clustering occurs without the addition of any binder to the system due to simple agitation of a powder, such as during storage or handling. For this reason, it is important in powder processing to be able to characterize this behavior. In this study, a sub-micron titania powder is mechanically vibrated under controlled conditions to induce clustering and promote auto-granulation. The amplitude and frequency of the vibration is varied to view the effect on the equilibrium granule size. A statistical model of the effect is also developed to determine that the granule size increases linearly with vibrational energy. Furthermore, imaging of cross-sections of the granules is conducted to provide insight into to the internal microstructure and measure the packing fraction of the constituent particles. It is found that under all vibrational conditions investigated the particles exhibit a core-rim microstructure.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Ku, NUNSPECIFIEDUNSPECIFIED
Hare, Cc.hare@surrey.ac.ukUNSPECIFIED
Ghadiri, MUNSPECIFIEDUNSPECIFIED
Murtagh, MUNSPECIFIEDUNSPECIFIED
Haber, RAUNSPECIFIEDUNSPECIFIED
Date : 1 December 2015
Identification Number : 10.1016/j.powtec.2015.05.041
Copyright Disclaimer : © 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Science & Technology, Technology, Engineering, Chemical, Engineering, Cohesion, Granulation, Vibration, Microstructure, PRESSURE SWING GRANULATION, BINDERLESS GRANULATION, COHESIVE POWDERS, FLUIDIZED-BED
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:48
Last Modified : 04 Aug 2017 11:26
URI: http://epubs.surrey.ac.uk/id/eprint/840415

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