Paper Title:
Powder Precursors for Nanoceramics: Cleaning and Compaction
  Abstract

Thermal surface purification in an inert gas flow and densification processes of SiC and diamond nanocrystalline powders with specific surface in the range of 60 – 300 m2/g and average grain sizes from 5 to 15 nm in diameter were examined. Termogravimetric Analysis (TGA) linked with mass spectrometry of outgassing products show that surface impurities desorb at up to 450°C. Further heating above 450°C leads to oxidation of the powder surface. Small Angle X-Ray Scattering (SAXS) and gas porosimetry (ASAP) was applied to investigate densification of the nanocrystalline powders. Compaction under 1GPa or higher pressure was found necessary for obtaining the ceramic matrix with porosity in the nanometer range.

  Info
Periodical
Solid State Phenomena (Volumes 99-100)
Edited by
Witold Lojkowski and John R. Blizzard
Pages
209-212
DOI
10.4028/www.scientific.net/SSP.99-100.209
Citation
G. Kalisz, A. Swiderska-Sroda, S. Gierlotka, E. Grzanka, B. F. Palosz, S. Stelmakh, "Powder Precursors for Nanoceramics: Cleaning and Compaction", Solid State Phenomena, Vols. 99-100, pp. 209-212, 2004
Online since
July 2004
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Price
$35.00
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