公开(公告)号：US12187608B2

公开(公告)日：2025-01-07

申请号：US16755715

申请日：2018-08-17

Applicant: DENKA COMPANY LIMITED

Inventor： Go Takeda ,  Michiharu Nakashima ,  Yoshitaka Taniguchi

IPC: C01B21/064

Abstract: To provide a boron nitride powder having excellent heat conductivity and high particle strength. Provided is a boron nitride powder which comprises bulky boron nitride formed such that scaly primary particles of hexagonal boron nitride are aggregated to form bulky particles, and which has the following characteristics (A) to (C): (A) a particle strength of the bulky particles at a cumulative breakdown rate of 63.2% is 5.0 MPa or more; (B) an average particle size of the boron nitride powder is 2 μm or more and 20 μm or less; and (C) an orientation index of the boron nitride powder as determined from X-ray diffraction is 20 or less.