A new member of the carbon material family

On November 25th, Beijing time, the top international academic journal Nature published two research papers from Chinese scientists.
One was the researcher of Beijing High Pressure Science Research Center, Hui Yang, who synthesized a new form of diamond.
—— Subcrystalline diamond.
The other is that the team of Professor Liu Bingbing of Jilin University realized the synthesis of millimeter-level nearly all sp3 amorphous carbon bulk materials, marking the addition of two new members to the carbon material family
.

Finding new carbon materials has always been a frontier scientific issue in the field of materials
.

The hypocrystalline diamond synthesized by researchers at Beijing High Voltage Scientific Research Center fills in the missing link in the atomic arrangement scale between the amorphous structure and the crystal structure, and provides a key to a deeper understanding of the complex structure of amorphous materials
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The hypocrystalline structure model essentially introduces a nano-sized mid-range ordered structure into the amorphous matrix
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The discovery of paracrystalline diamond has added a new structural form to the carbon material family.
It has excellent mechanical properties, thermal stability and unique optical properties.
It has important application prospects in high-end technical fields and extreme environments.
Conducive to the further development of new diamond-like materials
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Coincidentally, the millimeter-level nearly full sp3 amorphous carbon bulk material synthesized by the researchers of Jilin University also adopts the self-developed key technology of ultra-high pressure large-cavity press
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In addition, in order to break through the pressure limit of the commercial large-cavity press, the researchers used the domestic cemented carbide anvil to break through the pressure limit of the commercial Walker-type large-cavity press, and developed a large-cavity press with a millimeter-level sample cavity.
The key technology for high-pressure generation achieves ultra-high pressures of up to 370,000 atmospheres under high temperature conditions, and this technology has successfully achieved the synthesis of millimeter-level nearly full sp3 amorphous carbon bulk materials for the first time
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This breakthrough achievement was evaluated by Nature reviewers as "there are few research groups in the world whose large-cavity press technology can achieve such high temperature and pressure conditions", "a major advance in the field of amorphous materials", and "a superhard material.
" A unique member has been added to the family", "providing a novel characterization of physical properties, which is original and extremely interesting in the fields of condensed matter physics and chemistry"
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From the classification of the material morphology and the degree of order of the atomic arrangement, carbon materials can be divided into long-range ordered crystalline carbon and disordered amorphous carbon
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In recent years, amorphous materials have attracted more and more attention due to their distinctive characteristics that are different from crystalline materials, such as isotropy
.