LI Zhen, ZANG Jin-hao, LOU Qing etc. Sub-micron Sized Diamonds Prepared from Polycyclic Organic Compounds by HPHT Method[J]. Chinese Journal of Luminescence, 2019,40(2): 153-158
LI Zhen, ZANG Jin-hao, LOU Qing etc. Sub-micron Sized Diamonds Prepared from Polycyclic Organic Compounds by HPHT Method[J]. Chinese Journal of Luminescence, 2019,40(2): 153-158 DOI: 10.3788/fgxb20194002.0153.
Sub-micron Sized Diamonds Prepared from Polycyclic Organic Compounds by HPHT Method
The sub-micron size diamond powders are ideal abrasives for ultrafine rubbing and polishing. However
the synthesis and preparation of high-quality sub-micron size diamond powders are still faced with lots of difficulties and challenges until now. High-quality diamond powders with sub-micron size were synthesized successfully from naphthalene at a temperature of 1 700℃ and a pressure of 11 GPa without using metal-catalysts. The phase purity of the synthesized diamond powders was extremely high. Most of the diamond grains were euhedral crystals showed well-developed crystal morphology and dispersed to each other. The frequency distribution of the diamond grain size was in positive skew distribution
values of the mean
median and mode were 158.1
221.5
262.5 nm
respectively. For lognormal distribution
the expected value of the diamond grain size and the standard deviation were (243.34.2) nm and (122.35.4) nm
respectively. Nearly 96% of the diamond grains were distributed in the sub-micron size range. It may provide an effective way for the synthesis and preparation of high-quality sub-micron size diamond powders.
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