Pressure-equalizing type diamond synthesis device and diamond synthesis method based on device

Abstract

The invention discloses a pressure-equalizing type diamond synthesis device and a diamond synthesis method based on the device. The pressure-equalizing type diamond synthesis device comprises a cubic apparatus, wherein the concave arc-shaped top pressing surface of each top hammer forms a spherical top pressing cavity; a pair of opposite top hammers is provided with a conductive electrode respectively; and the conductive electrode is isolated from the corresponding top hammer. The pressure-equalizing type diamond synthesis device further comprises a spherical raw material synthesis block made of graphite and a catalyst, wherein a spherical pyrophyllite synthesis bowl matched with the spherical top pressing cavity is arranged on the raw material synthesis block; a conductive communicating device corresponding to the conductive electrode and the raw material synthesis block are arranged on the pyrophyllite synthesis bowl; the raw material synthesis block and the pyrophyllite synthesis bowl are spherical and matched with each other; the top pressing surface of the top hammer has a concave arc shape matched with the top hammer; the top hammers apply pressure to the raw material synthesis block from six directions; the pressure in the spherical top pressing cavity is uniform; any angle of the raw material synthesis block is extruded uniformly; when the raw material synthesis block are electrified and heated, the raw material synthesis block has high resistance value and is heated quickly and uniformly; and the synthesis efficiency of the diamond is improved.

Description

technical field [0001] The invention relates to a diamond synthesis device, and also relates to a diamond synthesis method based on the synthesis device. Background technique [0002] Diamond is the strongest carbon structure, in which the carbon atoms are arranged in the form of a crystal structure, each carbon atom is closely bonded to the other four carbon atoms, and the diamond atoms are in a three-dimensional regular tetrahedral structure, showing a pyramidal structure , forming a spatial network structure, and finally formed a solid with high hardness and poor activity; the carbon atoms in graphite are bonded together in a planar layered structure, and the bonding between layers is relatively weak, so the layer-to-layer Easy to slide and come apart. Under high temperature and high pressure, carbon atoms between different layers of graphite can form covalent bonds. When this high temperature and high pressure state lasts for a certain period of time, a large number of ...

AI Technical Summary

Problems solved by technology

Since the entire assembly is square or flat, this structure affects the temperature balance and pressure balance inside the cavity, so the diamond particle size, shape, hardness and other characteristics of the produced diamond are not balanced.

Similarly, because the anvil of the traditional press is square, and the inside of the cavity of the pyrophyllite assembly block is a cylinder, the transmission of internal pressure and the trend of current are not balanced, so the temperature and pressure of the synthesis column inside the pyrophyllite assembly block are also Unbalanced, affecting the synthesis efficiency of diamond

Images