Preparation of Ceramic Powders Using Supercritical Nonaqueous Solvents

Tsugio Sato

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The survey deals with the preparation of ceramic powders by crystallizing in nonaqueous solvents and supercritical drying. The sintering behaviors and mechanical properties of sintered bodies are very much sensitive to the crystallizing conditions, since hard agglomerates formed when the precipitated gels were crystallized by normal calcination in air whereas soft agglomerates formed when they were crystallized in water or organic solvents. CeO2-ZrO2 powders crystallized in methanol and water at 250°C were sintered to full theoretical density at 1100° and 1400°C, respectively, whereas that crystallized by calcination in air at 450°C was sintered to only 95.2% of theoretical density even at 1500° C. Sintered bodies fabricated using the powders crystallized and dried using supercritical methanol possessed excellent mechanical properties.

    Original languageEnglish
    Pages (from-to)1203-1208
    Number of pages6
    Journaljournal of the japan society of powder and powder metallurgy
    Volume41
    Issue number10
    DOIs
    Publication statusPublished - 1994 Feb 1

    ASJC Scopus subject areas

    • Mechanical Engineering
    • Industrial and Manufacturing Engineering
    • Metals and Alloys
    • Materials Chemistry

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