Chapter 2. Synthesis and Characteristics of Ceramic Powders Made from Laser-Heated Gases

  1. William Smothers
  1. R. A. Marra and
  2. J. S. Haggerty

Published Online: 26 MAR 2008

DOI: 10.1002/9780470318140.ch2

A Collection of Papers Presented at the 1981 New England Section Topical Meeting on Nonoxide Ceramics: Ceramic Engineering and Science Proceedings, Volume 3, No. 1/2

A Collection of Papers Presented at the 1981 New England Section Topical Meeting on Nonoxide Ceramics: Ceramic Engineering and Science Proceedings, Volume 3, No. 1/2

How to Cite

Marra, R. A. and Haggerty, J. S. (1982) Synthesis and Characteristics of Ceramic Powders Made from Laser-Heated Gases, in A Collection of Papers Presented at the 1981 New England Section Topical Meeting on Nonoxide Ceramics: Ceramic Engineering and Science Proceedings, Volume 3, No. 1/2 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470318140.ch2

Author Information

  1. Massachusetts Institute of Technology Cambridge, MA O2139

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1982

ISBN Information

Print ISBN: 9780470373934

Online ISBN: 9780470318140

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Keywords:

  • monodispersed;
  • carbide;
  • microstructure;
  • orthogonally;
  • magnitude

Summary

Si, S13, N4, and SiC powders having nearly ideal characteristics have been synthesized from CO2 laser-heated gas-phase reactions. The process is described with respect to fluid flow, heat transfer, reaction thresholds, and gas-heating rates. The extinction of an He-Ne laser beam through the reaction flame provided direct measures of particulate nucleation and growth rates. The resulting powders are small (<0.2 μm), spherical, nearly monodispersed, extremely pure, and loosely agglomerated. The dependence of the powder characteristics on the process parameters is discussed.