Key points are not available for this paper at this time.
Large high-quality type IIa diamond crystals measuring up to 12 mm in diameter were successfully synthesized by the temperature gradient method at high pressure and high temperature, using high-crystalline-quality (001)-oriented seed crystals, and by controlling the temperature conditions with high precision. The X-ray projection topograph using a synchrotron radiation beam revealed that the large synthetic diamond crystals are characterized by high-crystalline-quality, having no dislocation or stacking fault in the (001) growth sectors in the upper part of the crystals grown on seeds. Diamond crystals containing a large defect free area of 5 ×5 mm 2 or more were successfully produced by controlling the temperature strictly on the low-temperature side in the synthesis region for growing type IIa diamond crystals to allow the (001) growth sectors to become dominant.
Sumiya et al. (Thu,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: