Boron nitride powder, method for producing same, and heat-dissipating member produced using same
AssigneeDenka Company Limited
InventorsGo Takeda, Michiharu Nakashima, Yoshitaka Taniguchi
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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.
Claims4
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.
Dependencies are inferred from the claim text.