The Significance of High Pressure Synthesis Technology

October 26, 2018

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It is well known that the success of synthetic diamond in 1955, greatly stimulated the development of high pressure synthesis research. Over the past 60 years, the development of high pressure technology has enabled the synthesis of thousands of new phases, especially the superhard materials (such as synthetic diamond and CBN).

High pressure can alter the electromagnetic interactions strongly between atoms, and even nuclear interactions. Under high pressure, the space decreases between the atoms inside the materials, and the electron structure will be mutated, which will lead to the instability of the original extranuclear electron bond state and atomic arrangement mode, and the appearance of new chemical substances and crystal/amorphous structure. The periodic table and phase diagram under atmospheric pressure will have a distinct form under high pressure.

With the development of high pressure science and technology, the "Two-dimensional" industrial production, which is mainly controlled by temperature and chemical composition (T-X), began to enter the "Three-dimensional" industrial production which is controlled by three thermodynamic parameters, namely pressure (strong), temperature and chemical composition (P-T-X). The behavioral study of the materials under extreme conditions such as ultra-high pressure, is regarded as the research field most likely to achieve major scientific breakthroughs in the future.

The high pressure synthesis technology of superhard materials in China has a history of more than 60 years. Inspired by the structure of the earth's crust, the cubic press with Chinese characteristics appeared.
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