Synthesis, Processing and Sintering of Nanosized Alpha Alumina Powder

  1. Prof. Dr. G. Müller
  1. G. R. Karagedov

Published Online: 27 APR 2006

DOI: 10.1002/3527607293.ch11

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

How to Cite

Karagedov, G. R. (2000) Synthesis, Processing and Sintering of Nanosized Alpha Alumina Powder, in Ceramics - Processing, Reliability, Tribology and Wear, Volume 12 (ed G. Müller), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607293.ch11

Editor Information

  1. Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, 97082 Würzburg, Germany

Author Information

  1. Institute of Solid State Chemistry and Mechanochemistry, Novosibirsk, Russia

Publication History

  1. Published Online: 27 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301942

Online ISBN: 9783527607297

SEARCH

Keywords:

  • ceramics;
  • nanosized alpha alumina powder;
  • synthesis;
  • processing;
  • sintering

Summary

The present paper deals with an idea of introducing in a powder subjected to severe comminution a certain substance referred to as «grinding catalyst». It must be inert to aluminum oxide and provides mechanical barrier between crystallites, thus preventing them from coalescence. The elimination of this substance from the resulting powder should destroy the aggregates and lead to the powder composed of separate crystallites. The properties of the resulting powder with respect to green body formation and sintering into a dense material has been studied.

Additionally it has been shown that nanopowder produced can be used as a seed material to reduce γ[RIGHTWARDS ARROW]α transformation temperature and to get pure and fine alumina.