Shi Diwei, Zhengzhou University: Functional Application of Artificial Diamonds

Abstract Brilliant diamonds are actually natural diamonds after being cut and polished. Natural diamonds are particularly expensive due to their scarcity in nature. The formation conditions of diamond are also very demanding. It is the high temperature and high pressure condition in the process of crustal movement to transform graphite into metastable...
Brilliant diamonds are actually natural diamonds that have been cut and polished. Natural diamonds are particularly expensive due to their scarcity in nature. The formation conditions of diamond are also very demanding. It is formed by transforming graphite into metastable diamond under high temperature and high pressure conditions during crustal movement. The arrangement of carbon atoms in the crystal structure of diamond is a regular tetrahedral structure formed by covalent bond of CC and infinitely expands in space. This special structure makes it the hardest substance in nature today. The high hardness characteristics make it widely used in the industrial abrasive industry, but natural diamonds are scarce, so the synthetic technology is quite critical. In the middle of the last century, the technicians of Zhengzhou Abrasives Grinding Research Institute used high temperature and high pressure technology to synthesize China's first synthetic diamond in China's self-developed six-face press, which also marked the opening of a brand new The era of carbon materials.
In the early days of the creation of artificial diamonds, they were widely used in the preparation of abrasive tools. Compared with ordinary abrasive tools, the birth of superhard abrasives has greatly improved the efficiency of industrial production. As the research progresses, other excellent properties of diamond are gradually known.
At room temperature, the thermal conductivity of synthetic diamond is the highest among the known minerals, reaching 900~2300W/(mK), which is 2~5 times of copper (400W/(mK)) under the same conditions, high heat. The conductivity makes the artificial large single crystal diamonds expected to be applied to the LED heat dissipating material, and the composite material prepared by mixing with the metal material is expected to be applied to the field of electronic device packaging materials.
The optical transparency of synthetic diamonds is also excellent, especially in the ultraviolet to infrared region of the band of 225 m~25 m. It has high permeability and is highly resistant to radiation damage. It is expected to be prepared into an infrared window. material.
The nano-synthetic diamond synthesized by the bombardment method has good biocompatibility, no toxic and carcinogenic mutagenesis to the human body, and good surface activity of the diamond, which can realize the loading of the drug, and is applied to the treatment of tumors and gastrointestinal diseases. Very good effect.

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Specification size

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Surface Finish

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Thickness

1-9mm

Color

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Hardness

3H-6H

Materials

PVC

Type

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Life Span

15 years

Place of original

China


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