ZIRCONIA COMPOSITION AND METHOD FOR PRODUCING THE SAME

To provide a calcined body that is easy to process and that suppresses differences in hardness between production lots, and to provide a zirconia composition that serves as a raw material for the calcined body.SOLUTION: A zirconia composition comprises: one or more first transition metal elements selected from Mn, Fe, Co, Ni, Cu, Mo, Tc, Ru, Rh, Pd, and Ag; at least one coloring element of a lanthanide rare earth element and a second transition metal element different in type from the first transition metal element; and zirconia containing a stabilizing element. A content of the first transition metal element is 100 mass.ppm or more and a content of the second transition metal element is less than 100 mass.ppm. The zirconia composition satisfies at least one of the followings: a ratio of measured points where a ratio of intensity of a characteristic X-ray of the first transition metal element to that of the zirconium element is 0.05 or more, is 3% or less of all the measured points; and a distribution width of the ratio of intensity of a characteristic X-ray of the first transition metal element to that of the zirconium element is 0.3 or less.SELECTED DRAWING: None 【課題】加工しやすく、製造ロット間の硬度の相違が抑制された仮焼体、及び仮焼体の原料となるジルコニア組成物を提供する。【解決手段】Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｍｏ、Ｔｃ、Ｒｕ、Ｒｈ、Ｐｄ及びＡｇから選ばれる１以上の第１の遷移金属元素と、ランタノイド希土類元素及び第１の遷移金属元素と種類の異なる第２の遷移金属元素の少なくともいずれかの着色元素と、安定化元素含有ジルコニアと、を含み、第１の遷移金属元素の含有量が１００質量ｐｐｍ以上であり、第２の遷移金属元素の含有量が１００質量ｐｐｍ未満であり、かつジルコニウム元素の特性Ｘ線の強度に対する第１の遷移金属元素の特性Ｘ線の強度の比が０．０５以上となる測定点の割合が全測定点の３％以下であること、及びジルコニウム元素の特性Ｘ線の強度に対する第１の遷移金属元素の特性Ｘ線の強度の比の分布幅が０．３以下であることの少なくともいずれかを満たす、ジルコニア組成物。【選択図】なし