| 摘要 |
PROBLEM TO BE SOLVED: To provide hexagonal boron nitride powder capable of obtaining a resin composition having both high thermal conductivity and high dielectric strength, in a resin composition obtained by filling a resin.SOLUTION: Hexagonal boron nitride powder contains aggregated particles formed of primary particles of hexagonal boron nitride, and has a BET specific surface area of 0.7-1.3 m/g and oil absorption measured according to JIS K 5101-13-1 of 80 g/100 g or less. The hexagonal boron nitride powder is obtained by reduction-nitriding a mixture which contains a boron compound, a carbon black that has a BET specific surface area of 70 m/g or less and DBP absorption measured according to JIS K 6217-4 of 100 ml/100 g or less, and an oxygen-containing calcium compound, in a specific ratio.SELECTED DRAWING: Figure 1 |
