Low temperature sintering and mechanical properties of CeO2 and MO (M = Ca, Mg) codoped ZrO2 crystallised in supercritical methanol

S. Yin, Y. Fujishiro, S. Uchida, T. Sato

    Research output: Contribution to journalArticlepeer-review

    Abstract

    CeO2 and MO (M = Mg, Ca) codoped zirconia powders were prepared by crystallising amorphous gels of the mixtures of end members and intermediate .compositions along the tie lines joining 12 mol.-%CeO2 doped ZrO2 (12CeO2-88ZrO2) to 9 mol.-%MgO doped ZrO2 (9MgO-91ZrO2) and 12CeO2-88ZrO2 to 12 mol.-%CaO doped ZrO2 (12CaO-88ZrO2) in supercritical methanol at 250°C for 5 h and supercritical drying. Compacts of (CeO2, MO)-ZrO2 powders were sintered to almost theoretical density at low temperature (1200-1250°C). Sintered bodies consisting of 10-15 mol.-% 9MgO-91ZrO2 or 25 mol.-% 12CaO-88ZrO2 possessed excellent mechanical properties and showed no noticeable tetragonal to monoclinic phase transformation on annealing in water for 50 h at 200°C.

    Original languageEnglish
    Pages (from-to)68-73
    Number of pages6
    JournalBritish Ceramic Transactions
    Volume97
    Issue number2
    Publication statusPublished - 1998 Dec 1

    ASJC Scopus subject areas

    • Ceramics and Composites

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