Influence of precursor preparation via ammonolysis route on alumina-zirconia nanostructure

Jun Min Tang, Masato Uehara, Naoya Enomoto, Junichi Hojo, Zenbe E. Nakagawa

Research output: Contribution to journalArticle

Abstract

Al2O3-ZrO2 composite precursor was synthesized by introducing ammonia into a liquid mixture of ZrO2 sol and Al (NO3)3 aqueous solution. Precipitation of bayerite suggested a degradation in the dispersion of ZrO2 nanoparticles in the Al2O3 matrix during heat treatment. In order to avoid the formation of bayerite, it was preferred to produce a precipitation with a diluted NH3 water solution with NH3 + N2 gas by controlling the hydration temperature and the NH3-adding methods. After suitable calcination and hot pressing, we successfully synthesized a uniform Al2O3-ZrO2 microstructure in which tetragonal zirconia particles of 30 nm were finely dispersed within the alumina grains.

Original languageEnglish
Pages (from-to)201-204
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume109
Issue number1267
DOIs
Publication statusPublished - Jan 1 2001

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ammonolysis
Aluminum Oxide
zirconium oxides
Zirconia
Nanostructures
Alumina
aluminum oxides
routes
preparation
hot pressing
Polymethyl Methacrylate
Hot pressing
pressing
Sols
Ammonia
Hydration
Calcination
roasting
hydration
ammonia

All Science Journal Classification (ASJC) codes

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

Cite this

Influence of precursor preparation via ammonolysis route on alumina-zirconia nanostructure. / Tang, Jun Min; Uehara, Masato; Enomoto, Naoya; Hojo, Junichi; Nakagawa, Zenbe E.

In: Journal of the Ceramic Society of Japan, Vol. 109, No. 1267, 01.01.2001, p. 201-204.

Research output: Contribution to journalArticle

Tang, Jun Min ; Uehara, Masato ; Enomoto, Naoya ; Hojo, Junichi ; Nakagawa, Zenbe E. / Influence of precursor preparation via ammonolysis route on alumina-zirconia nanostructure. In: Journal of the Ceramic Society of Japan. 2001 ; Vol. 109, No. 1267. pp. 201-204.
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