Hexagonal boron nitride powder and a high thermal conductivity using the same, high moisture resistance radiation sheet

摘要

PROBLEM TO BE SOLVED: To provide a heat radiation sheet excellent in heat conductivity and moisture resistance, and a hexagonal boron nitride powder used in the heat radiation sheet.;SOLUTION: The hexagonal boron nitride powder has been subjected to a surface modification treatment with a silane coupling agent having an organic functional group containing a vinyl group, and has an aggregate shape formed by aggregating scale-like primary particles of hexagonal boron nitride having a methanol-soluble B₂O₃ content of 0.01-0.10% without orientation. The high heat conductivity and high moisture resistance heat radiation sheet is prepared by formulating the hexagonal boron nitride powder into a resin and/or rubber.;COPYRIGHT: (C)2012,JPO&INPIT