A review of models for single particle compression and their application to silica microspheres

Paul J, Romeis S, Tomas J, Peukert W (2014)

Publication Language: English

Publication Type: Journal article, Review article

Publication year: 2014

Journal

Advanced Powder Technology Elsevier

Publisher: Elsevier

Book Volume: 25

Pages Range: 136-153

Volume: 25

Issue: 1

Journal Issue: 1

DOI: 10.1016/j.apt.2013.09.009

Abstract

We report on the deformation behavior of single silica microspheres. For the first time a detailed discussion on the quantitative evaluation of force–deformation data in the elastic and plastic regime is given. The microspheres are compressed between two flat plates of a custom built manipulation device supported by a scanning electron microscope. The device allows a high sample throughput enabling full statistical evaluation of force–deformation data of single microspheres. Existing theories describing the deformation behavior of single spheres are discussed and applied to the elastic and plastic deformation regime of silica microspheres. The results obtained from the theories are compared between each other and values reported in literature. The silica microspheres exhibit a significantly different deformation behavior than expected from bulk fused silica, i.e. a distinct plastic deformation behavior. Furthermore, a significant decrease in Young’s modulus and hardness was observed caused by high porosity and reduced crosslinking of silicon atoms, respectively, that is inherent to silica produced by Stöber synthesis. However, the calculated contact pressures exceed the compressive strength of bulk fused silica by at least a factor of two as an effect of a reduced amount of material flaws in microstructures.

Authors with CRIS profile

Jonas Paul Lehrstuhl für Partikelsynthese (LFG) Stefan Romeis Lehrstuhl für Partikelsynthese (LFG) Wolfgang Peukert Lehrstuhl für Partikelsynthese (LFG)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM) Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Involved external institutions

Otto-von-Guericke-Universität Magdeburg DE Germany (DE)

How to cite

APA:

Paul, J., Romeis, S., Tomas, J., & Peukert, W. (2014). A review of models for single particle compression and their application to silica microspheres. Advanced Powder Technology, 25(1), 136-153. https://doi.org/10.1016/j.apt.2013.09.009

MLA:

Paul, Jonas, et al. "A review of models for single particle compression and their application to silica microspheres." Advanced Powder Technology 25.1 (2014): 136-153.

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