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 journalArticlepeer-review

    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 - Mar 2001

    All Science Journal Classification (ASJC) codes

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

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