| 摘要 |
PROBLEM TO BE SOLVED: To produce fine powdery zirconia with a simple process having good moldability, excellent in sinterability and excellent also in quality reliability when it is formed into a sintered compact. SOLUTION: The fine powdery zirconia contains at least one selected from Y2O3, MgO, CaO and CeO2 as a stabilizer allowed to enter into solid solution, has a 5-30 m2/g BET specified surface area and contains alumina. Fine particles of zirconia hydrate containing at least one of compounds of yttrium, magnesium, calcium and cerium and an aluminum compound are calcined at 700-1,200 deg.C to produce the fine powdery zirconia. |
