| 摘要 |
Although light-permeable zirconia sintered bodies can be improved in light permeability by incorporating titania thereinto, the sintered bodies have such a defect that mechanical strength is deteriorated. Thus, disclosed is a titanium oxide-containing zirconia sintered body which contains 6 to 15 mol% of yttria and 3 to 20 mol% of titania and has a linear permeability of 50% or more as measured using a 1 mm-thick sample at a measurement wavelength of 600 nm, particularly a high-quality transparent zirconia sintered body which contains 3 to 20 mol% of titania and 6 to 15 mol% of yttria, has a linear permeability of 73% or more as measured at a measurement wavelength of 600 nm, a haze rate of 2.0% or less and high light-permeability, and has no turbidness (cloudiness), which is provided as a highly transparent zirconia sintered body having high light-permeability. Also disclosed is a production process which comprises shaping a powder of the above-mentioned composition, and carrying out normal primary sintering and hot isostatic press (HIP) processing under specified conditions using the shaped product. |
