Dry Pressing Boehmite Gels for the Fabrication of Monolithic α-Al2O3

Seongtae Kwon, Gary L. Messing

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

It is demonstrated that dense alpha alumina can be fabricated by pressing ethanol-dispersed, α-Al2O3 seeded boehmite. Green bodies were formed by uniaxially pressing either water or ethanol dispersed gel powder and then isostatically pressing the compacts at 280 MPa. Green microstructure and alumina densification are correlated with gel agglomerate size and dispersing medium. The ethanol-dispersed specimens showed better sinterability than the water-dispersed specimens, and sintered to more than 99% theoretical density at 1300°C. It is shown that softer gel agglomerates were obtained by alcohol dispersion and resulted in better green microstructure and higher sintered density.

Original languageEnglish (US)
Pages (from-to)53-64
Number of pages12
JournalJournal of Sol-Gel Science and Technology
Volume9
Issue number1
DOIs
StatePublished - Jan 1 1997

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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