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Cubic boron nitride single crystal was synthesized using the mixture of compound B 2 O 3 or element B and Li 3 N by chemical reaction under high pressure and high temperature. The lowest conditions of cubic boron nitride formation in two systems 4.0 GPa, 1400 °C or 4.5 GPa, 1450 °C are obviously lower than that in Li 3 N-hexagonal boron nitride system. In this study,...
Generally, cBN crystals exhibit many colors from white, yellow to black due to different impurities and defects present in them. In this paper, black cBN crystals with relatively integrated octahedral morphology were obtained in hBN–Li 3 N–B system under high temperature and high pressure. The color, morphology and property of the synthesized cBN crystals were extensively studied. X-ray diffraction...
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