Sintered spherical BN particles, method of producing the same, and polymer material

摘要

Sintered spherical BN particles having secondary particles formed of aggregated primary BN particles, in which the number ratio of particles, each having a recess on its surface is 50% or more in the sintered spherical BN particles, and each of the sintered spherical BN particles has a compressive strength of 0.1 MPa to 100 MPa. The sintered spherical BN particles are not only excellent in heat dissipation properties and adhesiveness, but also have high compressive strength, and therefore, show a small variation in heat dissipation properties and is free from conduction failure, which would otherwise be caused by exfoliation of the copper foil, when used as a filling material for a polymer composite material.

主权项

1. Sintered spherical BN particles comprising secondary particles formed of aggregated primary BN particles, wherein the number ratio of particles, each having a recess on its surface, is 50% or more in the sintered spherical BN particles, and each of the sintered spherical BN particles has a compressive strength of 0.1 MPa to 100 MPa.