MAGNESIUM OXIDE PARTICLES, MAGNESIUM OXIDE PARTICLE PRODUCTION METHOD, RESIN COMPOSITION AND MOLDED BODY USING SUCH RESIN COMPOSITION, AND ADHESIVE OR GREASE

摘要

The purpose of the present invention is to provide magnesium oxide particles that have high thermal conductivity, excellent characteristics as a heat dissipating filler, and that can prevent soft-errors and the like in memory. This magnesium oxide particle is characterized by the following: the BET specific surface area is 0.1-17m2/g; the alpha ray amount is no more than 0.005c/cm2·Hr; and the relationship between the BET specific surface area x (m2/g) and the peak strength y (cps) at a Bragg angle (2&thetas;) of 42.80-43.00° in an X-ray diffraction spectrum is represented by formula (1) below. y≥-960x+33000...(1)