Sintering of mixtures of seeded boehmite and ultrafine α-alumina

Seongtae Kwon, Gary L. Messing

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

α-Alumina was fabricated by dry pressing mixtures of seeded boehmite and fine α-alumina (i.e., 0.2 and 0.3 μm diameter) to reduce the large shrinkage of boehmite-derived α-alumina. The maximum green density was obtained with mixtures containing approx. 70% α-alumina for both alumina powders. The approx. 15% linear shrinkage and microstructures of these samples were comparable to 100% alumina powder samples. Samples with 0.2 μm alumina sintered to densities >95% at 1300°C whereas 1400°C was needed for samples with 0.3 μm alumina. These results indicate that boehmite can be used as a substitute for relatively expensive ultrafine α-alumina powders.

Original languageEnglish (US)
Pages (from-to)82-88
Number of pages7
JournalJournal of the American Ceramic Society
Volume83
Issue number1
DOIs
StatePublished - Jan 1 2000

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Sintering of mixtures of seeded boehmite and ultrafine α-alumina'. Together they form a unique fingerprint.

Cite this