SPHERICAL COATED MAGNESIUM OXIDE POWDER AND METHOD FOR PRODUCTION THEREOF, AND RESIN COMPOSITION COMPRISING THE POWDER

摘要

A spherical coated magnesium oxide powder, characterized in that it is coated with a double oxide and has an average shape factor of 1.25 or less; a method for producing the spherical coated magnesium oxide powder which comprises causing a compound of an element to form a double oxide together with magnesium to be present on the surface of a magnesium oxide powder, and then melting it at a high temperature, to thereby coat the surface of the magnesium powder with the double oxide and simultaneously make the surface spherical; a resin composition comprising the spherical coated magnesium oxide powder; and an electronic device using the resin composition. The spherical coated magnesium oxide powder is excellent in the resistance to moisture and also exhibits excellent filling property and fluidity when used as a filler into a resin.