Magnesium oxide particles and production method thereof

Abstract

The magnesium oxide particle of the present invention includes a spherical particle, the spherical particle including a plurality of dead-burned magnesium oxide particles, the dead-burned magnesium oxide particles being partially fused together in such a manner that open pores remain between the dead-burned magnesium oxide particles, the spherical particle having an average particle size (D2) of 10 μm or more and 200 μm or less, and the spherical particle having a projected image having a circularity of 0.7 or more. The spherical particles preferably have a porosity of 10% or more and 50% or less as determined by image analysis. The spherical particles preferably have a ratio of the average particle size D2 to the BET specific surface area-based equivalent particle size D1, D2/D1, of 3 or more and 10 or less.

Dependencies are inferred from the claim text.