Fabrication method of cubic boron nitride

摘要

A process for preparing large granules of cubic boron nitride from hexagonal boron nitride, which comprises using a binary alloy of Al-Mg as a catalyst under high temperature and pressure wherein binary alloy can be obtained by gas spraying of the alloy melt or grinding the agglomerates and easily treated due to its low activity, whereby the resultant cubic boron nitride crystal has large size without impurities.