Theoretical and experimental investigations on sintering kinetics of silica nanoparticles

Peukert W, Schmid HJ, Kirchhof M, Förster H (2006)

Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2006

Event location: Orlando, FL US

URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=56749092234&origin=inward

Abstract

The sintering kinetics of single silica nanoparticle contacts in the gas phase is investigated experimentally and theoretically. Experiments are conducted in a high-temperature short-time flow reactor allowing for precise control of temperature and residence time. Sintering experiments have been conducted for temperatures up to 1600 °C and residence times down to 5 ms. Results show significantly shorter sintering times than predicted by macroscopic sintering models. For vitreous materials such as silica the predominant sintering mechanism is supposed to be viscous flow. Therefore, three dimensional simulations of the sintering process have been conducted by solving the free surface viscous flow process using a volume-of-fluid (VOF) method. Additionally, van der Waals interactions have been considered as momentum source. The results suggest that molecular van der Waals interactions have great influence on the sintering kinetics of nanoparticles which is insufficiently described by macroscopic models.

Authors with CRIS profile

Wolfgang Peukert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Henning Förster Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik

How to cite

APA:

Peukert, W., Schmid, H.-J., Kirchhof, M., & Förster, H. (2006). Theoretical and experimental investigations on sintering kinetics of silica nanoparticles. In Proceedings of the 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology. Orlando, FL, US.

MLA:

Peukert, Wolfgang, et al. "Theoretical and experimental investigations on sintering kinetics of silica nanoparticles." Proceedings of the 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology, Orlando, FL 2006.

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