Patent ID: 9545363
Date: 2017-01-17
CPC Classifications: A61K,C04B,Y10T

Claim:
1. A machinable zirconia as a sintered body which is formed to include a tetragonal zirconia composite powder containing 79.8 to 92 mol % ZrO 2 , 4.5 to 10.2 mol % Y 2 O 3 , 3.5 to 7.5 mol % Nb 2 O 5 or 5.5 to 10.0 mol % Ta 2 O s , and a TiO 2 nano powder which is added with a weight ratio of between 0.05 wt % and 2.5 wt % of the composite powder, wherein a density of the sintered body is 99% or more, an average particle diameter of particles of the sintered body is 2 μm or more, hardness of the sintered body is in a range of 4 to 10 GPa, fracture toughness of the sintered body is in a range of 9 to 14 MPa·m