Advertisement

Convection Effects in Thermogravimetry: Significance and Corrections

  • Bengt O. Haglund
  • Torsten Luks

Abstract

During thermogravimetric measurements disturbances due to convection effects on the crucible are often encountered. Thermogravimetric blank tests were made using different furnaces, crucibles, atmospheres, gas flow rates and temperatures in a Mettler thermoanalyzer TA 1. The observed force on the crucible could be related to the friction forces calculated from previously known formulae for laminar gas flow. The contribution from this force is most pronounced at high gas flow rates and at high temperatures.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. (1).
    W.W. Wendlandt, Thermal methods of analysis. Second edition. Wiley, New York 1974Google Scholar
  2. (2).
    A.E. Newkirk, Anal. Chem 32 (1960) 1558CrossRefGoogle Scholar
  3. (3).
    G.M. Lukaszewski, Nature 194 (1962) 959CrossRefGoogle Scholar
  4. (4).
    P. Vallet, Thermogravimétrie. Gauthier-Villars Editeur, Paris 1972Google Scholar
  5. (5).
    F.A. Holland, Fluid flow for chemical engineers. E. Arnold, London 1973Google Scholar

Copyright information

© Springer Basel AG 1980

Authors and Affiliations

  • Bengt O. Haglund
    • 1
  • Torsten Luks
    • 1
  1. 1.Coromant Research CenterSandvik ABStockholm 42Sweden

Personalised recommendations