A STUDY OF THE PRESSURE-TEMPERATURE DEPENDENCE OF SYNTHETIC DIAMOND CRYSTAL GROWTH

The growth of diamond crystals under ultra-high-pressure high-temperature conditions is a rather complex physico-ehemical process. It is closely related with pressure, temperature, solvent-catalyst and starting carbonaceous material.By summing up the experience gained in the past on the basis of intensified practice and making thermodynamic analyses of the pressure-temperature dependence of synthetic diamond crystal growth, we have discovered the primary principles guiding the growth of larger synthetic diamonds of high strength and given a process for producing larger diamond crystals with outstanding strength nearly as high as that of natural diamonds, suitable for geological drills.