Microwave plasma synthesis of nanostructured γ-Al2O3 powders

L. Fu, D. Lynn Johnson*, Jian G. Zheng, Vinayak P. Dravid

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Nanostructured Al2O3 powders have been synthesized by combustion of aluminum powder in a microwave oxygen plasma, and characterized by X-ray diffraction and electron microscopy. The main phase is γ-Al2O3, with a small amount of δ-Al2O3. The particles are truncated octahedral in shape, with mean particle sizes of 21-24 nm. The effect of reaction chamber pressure on the phase composition and the particle size was studied. The γ-alumina content increases and the mean particle size decreases with decreasing pressure. No α-Al2O3 appears in the final particles. Electron microscopy studies find that a particle may contain more than one phase.

Original languageEnglish (US)
Pages (from-to)1635-1637
Number of pages3
JournalJournal of the American Ceramic Society
Volume86
Issue number9
DOIs
StatePublished - Sep 2003

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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