HEXAGONAL BORON NITRIDE SINGLE CRYSTAL, METHOD FOR MANUFACTURING THE SAME, COMPOSITE MATERIAL COMPOSITION MIXED WITH HEXAGONAL BORON NITRIDE SINGLE CRYSTAL AND HEAT DISSIPATION MEMBER OBTAINED BY MOLDING COMPOSITE MATERIAL COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a hexagonal boron nitride single crystal having 0.3 or more of an aspect ratio defined by the maximum thickness in the crystal c axis direction/the maximum width on a crystal ab plane, and a method for manufacturing the same.SOLUTION: The method for manufacturing a h-BN single crystal by a flux method comprises: mixing a BN powder using as a raw material and having 0.4° or more of a peak half value width on a 002 plane in XRD analysis with lithium salt using as flux; and heating the mixture at a predetermined temperature for a predetermined period to grow the mixture into a crystal. The h-BN single crystal is manufactured by the method promoting the c axis direction growth of the h-BN crystal more than the ab plane growth and has 0.3 or more of an aspect ratio defined by the maximum thickness in the crystal c axis direction/the maximum width on the crystal ab plane.SELECTED DRAWING: Figure 4