ENHANCED DENSIFICATION OF BOEHMITE SOL-GELS BY alpha -ALUMINA SEEDING.

Masato Kumagai, Gary Lynn Messing

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

The seeded gel sintered to 98% of theoretical density after 100 min at 1200 degree C, whereas the unseeded gel had to be sintered at 1600 degree C to reach 94% of theoretical density. This difference results primarily from nucleation by the alpha -alumina seeds and enhanced transformation of the boehmite to alpha -alumina, such that a uniform, well-ordered, fine-grained alpha -alumina microstructure forms prior to densification.

Original languageEnglish (US)
JournalJournal of the American Ceramic Society
Volume67
Issue number11
StatePublished - Nov 1984

Fingerprint

Aluminum Oxide
Densification
Sol-gels
Alumina
Gels
Seed
Nucleation
Microstructure
aluminum oxide hydroxide

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

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title = "ENHANCED DENSIFICATION OF BOEHMITE SOL-GELS BY alpha -ALUMINA SEEDING.",
abstract = "The seeded gel sintered to 98{\%} of theoretical density after 100 min at 1200 degree C, whereas the unseeded gel had to be sintered at 1600 degree C to reach 94{\%} of theoretical density. This difference results primarily from nucleation by the alpha -alumina seeds and enhanced transformation of the boehmite to alpha -alumina, such that a uniform, well-ordered, fine-grained alpha -alumina microstructure forms prior to densification.",
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ENHANCED DENSIFICATION OF BOEHMITE SOL-GELS BY alpha -ALUMINA SEEDING. / Kumagai, Masato; Messing, Gary Lynn.

In: Journal of the American Ceramic Society, Vol. 67, No. 11, 11.1984.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Kumagai, Masato

AU - Messing, Gary Lynn

PY - 1984/11

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N2 - The seeded gel sintered to 98% of theoretical density after 100 min at 1200 degree C, whereas the unseeded gel had to be sintered at 1600 degree C to reach 94% of theoretical density. This difference results primarily from nucleation by the alpha -alumina seeds and enhanced transformation of the boehmite to alpha -alumina, such that a uniform, well-ordered, fine-grained alpha -alumina microstructure forms prior to densification.

AB - The seeded gel sintered to 98% of theoretical density after 100 min at 1200 degree C, whereas the unseeded gel had to be sintered at 1600 degree C to reach 94% of theoretical density. This difference results primarily from nucleation by the alpha -alumina seeds and enhanced transformation of the boehmite to alpha -alumina, such that a uniform, well-ordered, fine-grained alpha -alumina microstructure forms prior to densification.

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