Synthesis of metastable tetragonal (t′) ZrO2-12 mol% YO1.5 by the organic polymerized complex method

Osamu Yokota, Masatomo Yashima, Masato Kakihana, Akira Shimofuku, Masahiro Yoshimura

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    17 Citations (Scopus)

    Abstract

    Zirconia-yttria (ZrO2-12 mol% YO1.5) powders were prepared via an organic polymerized complex method that was based on the Pechini-type reaction route. A mixed solution of citric acid, ethylene glycol, and zirconium and yttrium ions were polymerized to form a transparent resin, which then became a black powder after charring at ∼450°C. This product was used as a precursor for ZrO2-12 mol% YO1.5. The formation of a metastable tetragonal (t′) phase with compositional homogeneity occurred when the precursor was heated at the rate of 10°C/min up to a temperature >560°C. X-ray diffraction peaks became sharp with an increase in the heat-treatment temperature. A t′-form with cell parameters of a = 5.1265(6) Å and c = 5.1559(9) Å were obtained via heat treatment up to 1400°C. This study shows that the organic polymerized complex method is effective for obtaining the compositionally homogeneous metastable t′-form in the ZrO2-YO1.5 system for short annealing times at relatively lower temperatures.

    Original languageEnglish
    Pages (from-to)1333-1335
    Number of pages3
    JournalJournal of the American Ceramic Society
    Volume82
    Issue number5
    DOIs
    Publication statusPublished - 1999

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry

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