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Modern synthetic diamond technology
Apr 15, 2020
1. Static pressure synthetic transformation

According to the principle of natural diamond generation, the special diamond press is used to produce high pressure, and the graphite is transformed into diamond under the action of gold chip catalyst. There are a variety of explanations for this, to the extent that dissolved carbon is predominantly dissolved by metal catalysts, which, through penetration, thermal diffusion, and activation energy conversion, allows dissolved carbon to form diamond as SP3 hybrids. It is true that carbon is dissolved, but the argument is narrow-minded that carbon can be dissolved in certain metals, such as sn, but does not grow diamond, which of course requires the crystal structure of the synthetic diamond's catalyst metal, the electronic structure corresponding to the carbon, that is, the 3d outer layer electron is not saturated. Although the methods and approaches are different, the synthetic diamond is consistent with the natural diamond generation mechanism.


2. Synthesis of Diamond by Gas-CVD

Carbonaceous compounds such as methane, acetylene and acetone were used as carbon sources, heated in the vessel by thermofilament, microwave, plasma and other methods to ionize their decomposition. because of the low temperature at the substrate, activated carbon was deposited on the substrate to form a diamond film, which regulated the growth of the diamond film through the attraction of an applied dc electric field to the plasma between the thermofilament and the substrate and the passage of ar or h2, o2 gas.


The According to the principle of natural diamond generation, the special diamond press is used to produce high pressure, and the graphite is transformed into diamond under the action of gold chip catalyst. There are a variety of explanations for this, to the extent that dissolved carbon is predominantly dissolved by metal catalysts, which, through penetration, thermal diffusion, and activation energy conversion, allows dissolved carbon to form diamond as SP3 hybrids.


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