Analysis of trace amounts of emitted gases during fracture of high-purity alumina under ultrahigh vacuum-Effects of sintering atmosphere and sintering time on gas emission behavior

Mineaki Matsumoto, Satoshi Kitaoka, Hideaki Matsubara, Shigeru Kuramoto, Mikihiro Kanno

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The effects of sintering atmosphere and sintering time on gas emission behavior during fracture of high-purity Al2O3 were investigated under ultrahigh vacuum using a mass spectrometer to examine the behavior of gases in the material. The gas in the sintering atmosphere was predominantly emitted at the moment of fracture for all specimens. The total amount of gas emitted from a specimen sintered in O2 was less than that of a specimen sintered in air or Ar, showing that the mobility of O2 in the material was much higher than that of N2 or Ar. During prolonged sintering, the density of specimens decreased, while the amount of emitted gas increased. Entrapped gases in the sintered body were concluded to bring about the density decrease during grain growth.

Original languageEnglish
Pages (from-to)217-223
Number of pages7
JournalJournal of the Ceramic Society of Japan
Volume108
Issue number3
DOIs
Publication statusPublished - 2000

Keywords

  • Alumina
  • Mass spectrometer
  • Pore coalescence
  • Sintering atmosphere
  • Sintering time
  • Ultrahigh vacuum

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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