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Knut Deppert

Knut Deppert

Professor

Knut Deppert

Compaction of agglomerates of aerosol nanoparticles: A compilation of experimental data

Author

  • Martin Karlsson
  • Knut Deppert
  • Lisa Karlsson
  • Martin Magnusson
  • Jakob Malm
  • Srinivasan Iyengar

Summary, in English

The compacting behavior of agglomerated aerosol nanoparticles in the size range between 7 and 150 nm was investigated using available literature data. We observed a characteristic behavior, which can be described by three separate steps. When comparing the first step, the compaction from agglomerates into spherules, differences could be observed for nanoparticles of different materials. It is seen from the available data that smaller particles compact at lower temperatures. For most materials where data available (Ag, Au, Fe, W, PbS and SnO2), the compaction temperatures were found to lie in a temperature interval, between 1/3 and 1/2 of the bulk melting temperature. For the data available on TiO2, on the other hand, the compaction temperature corresponds to about 2/3 of the bulk melting temperature. Thus, a fundamental difference might exist in the sintering behavior of titania as compared with other materials. This difference may be attributed to a lower degree of cleanliness of the titania particles.

Department/s

  • Solid State Physics
  • Centre for Analysis and Synthesis
  • Materials Engineering

Publishing year

2005

Language

English

Pages

43-49

Publication/Series

Journal of Nanoparticle Research

Volume

7

Issue

1

Document type

Journal article

Publisher

Springer

Topic

  • Nano Technology

Keywords

  • nanoparticles
  • agglomerates
  • aerosols
  • sintering
  • processing

Status

Published

ISBN/ISSN/Other

  • ISSN: 1572-896X