Process study on alumina-zirconia nanocomposite via ammonolysis route

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Wet-chemical process using ammonia to precipitate aluminum ions dissolved in a zirconia sol solution is examined. Formation of crystalline bayerite is unfavorable for fine dispersion of zirconia nanoparticles in alumina matrix after heat treatment. To avoid the bayerite formation, it was preferred to make a precipitation with a diluted ammonia or with an ammonia gas flow at high temperature. By optimizing the precipitation process and the calcination temperature, we successfully prepared the uniform microstructure in which tetragonal zirconia particles of ∼30 nm is finely dispersed within the alumina grains.

Original languageEnglish
Pages (from-to)88-91
Number of pages4
JournalJournal of Ceramic Processing Research
Volume1
Issue number2
Publication statusPublished - Dec 1 2000

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

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