| abstract |
[Problem to be Solved]To provide at least either of a zirconia sintered body which can be produced even by using a sintering furnace that performs sintering in an air atmosphere with the mechanical strength and the translucency desired for use in dental prosthetic materials, a production method thereof, a precursor thereto, and a preparation method of the precursor.[Solution]The above problem can be solved by an aspect of the present disclosure including a zirconia sintered body comprising yttria and zirconia, containing yttria by a content ranging from 4.5 mol % or more to 6.5 mol % or less and zirconia as the remainder, the total light transmittance of a 1-mm thick sample measured in compliance with JIS K 7361-1 being 46.5 % or higher, the three-point bending strength being 700 MPa or higher, and a ratio of an integrated value for the total light transmittance to an integrated value for the parallel light transmittance of a 1-mm thick sample measured at the measurement wavelength ranging from 400 to 700 nm being 1.3 % or less. |