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.
|Number of pages||6|
|Journal||British Ceramic Transactions|
|Publication status||Published - 1998 Dec 1|
ASJC Scopus subject areas
- Ceramics and Composites