| abstract |
Provided is a magnesia-containing spinel powder capable of producing a ceramic sintered body with high strength and excellent strength stability. A magnesia-containing spinel powder, the 50% particle size (D50) is 0.30 to 10.00 μm, and the ratio of the difference between 90% particle size (D90) and D50 and the difference between D50 and 10% particle size (D10): (D90-D50)/(D50-D10) is 1.0 to 5.0, and the composition ratio of Mg and Al is 50 to 90 wt % for MgO and 50 to 10 wt % for Al 2 O 3 when converted into oxides. |