Alumina Monolith Formation by Flocculation of Boehmite Sols

Debra S. Horn, Gary L. Messing

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Flocculating a boehmite sol with ammonia results in drying and shrinkage uniformity which contributes to the formation of a dry monolithic gel. It is demonstrated that flocculation immobilizes the randomly dispersed platelet‐shaped boehmite particles, inducing uniform shrinkage and density in the gel structure. Flocculation also increases the rate of gelation and an increased gel integrity is attributed to the cumulative effects of both van der Waals attractive forces and increased hydrogen bond formation (gelation). Flocculation does not adversely effect either phase transformation or sintering of the seeded boehmite gels.

Original languageEnglish (US)
Pages (from-to)1719-1721
Number of pages3
JournalJournal of the American Ceramic Society
Volume72
Issue number9
DOIs
StatePublished - Sep 1989

Fingerprint

boehmite
Aluminum Oxide
Flocculation
Polymethyl Methacrylate
Sols
flocculation
aluminum oxide
Alumina
Gels
gel
Gelation
Van der Waals forces
Ammonia
Particles (particulate matter)
Drying
Hydrogen bonds
Sintering
ammonia
Phase transitions
hydrogen

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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Alumina Monolith Formation by Flocculation of Boehmite Sols. / Horn, Debra S.; Messing, Gary L.

In: Journal of the American Ceramic Society, Vol. 72, No. 9, 09.1989, p. 1719-1721.

Research output: Contribution to journalArticle

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