| abstract |
Provided are at least any one of a raw material for obtaining a zirconia sintered body which is obtained by pressureless sintering and has a high fracture toughness value measured by the SEPB method, a sintered body obtained by the raw material, and a method for producing the same.　The sintered body is characterized by comprising zirconia which contains a stabilizer and having a monoclinic ratio of 0.5% or more. Such a sintered body is preferably obtained by a production method which is characterized by using a powder characterized by comprising a stabilizer and containing zirconia having a monoclinic ratio of over 70%, and in that the monoclinic zirconia has a crystallite diameter of over 23 nm and 80 nm or less. |