| abstract |
Provided is a zirconia powder containing yttrium oxide in an amount of not less than 2.5 mol% and not more than 3.5 mol%, a specific surface area of not less than 5 m 2 /g and not more than 20 m 2 /g, and a proportion of monoclinic phase contained in a crystal phase of not less than 20% and not more than 40% Hereinafter, the monoclinic phase contained in the crystal phase of the sintered body sintered at 1450° C. for 2 hours after molding under the molding pressure of 0.8 t/cm 2 with a tetragonal phase ratio of not less than 60% and not more than 80% The proportion of the phase is more than 1% and less than 3%, the proportion of the square phase is more than 77% and less than 94%, and the proportion of the cubic phase is more than 5% and less than 20%. |