Novel large-cavity high-pressure device

Abstract

The invention discloses a large-cavity high-pressure device which is characterized by comprising six top hammers (1) synchronously driven by a cubic press, a pyrophyllite square frame (2) formed from pyrophyllite strips (4) and a pressure transmitting medium synthesis block (3) for containing synthesis raw materials, wherein the pressure transmitting medium synthesis block (3) is arranged in the pyrophyllite square frame (2) to form a pressure boosting unit, and the pressure boosting unit is placed in a cubic high-pressure cavity (5) formed by enclosing the six top hammers (1) of the cubic press. Compared with the cubic press-based high-pressure device applied in the prior art, the device provided by the invention has the advantages of more uniform pressure distribution, larger sample cavity, lower cost, higher pressure generating efficiency and the like, and the pressure limit is increased from 6 GPa of the traditional device to 8 GPa.

Description

Technical field [0001] The invention relates to a large-cavity high-pressure device, more specifically, a large-cavity static high-pressure device used in the synthesis of diamond, cubic boron nitride and their composite materials. technical background [0002] Pressure and temperature are the basic thermodynamic factors that determine the existence of matter. The synthesis of superhard materials such as diamond, cubic boron nitride (cBN), and their composite materials requires a high-pressure and high-temperature environment. The main equipment used in the synthesis is a large-cavity static high-pressure device. The large-cavity static high-pressure device is mainly divided into a first-stage pressurized high-pressure device and a second-stage pressurized high-pressure device. The two-stage pressurized high-pressure device mainly includes a two-stage six-eight-body static high-pressure device based on a two-side top press and a two-stage six-eight-body static high-pressure devi...

AI Technical Summary

Problems solved by technology

The two-stage pressurized high-pressure device mainly includes a two-stage six-eight-body static high-pressure device based on a two-sided top press and a two-stage six-eight-body static high-pressure device based on a six-side top press (Chinese patent, patent publication number: CN 101091895A ), the two-stage pressurized high-pressure device can obtain very high pressure (up to about 80GPa) but the sample cavity is small (mm order), and the two-stage pressurized high-pressure device is difficult to meet the large sample cavity size required for production Therefore, it is mainly used in the field of scientific research

However, when this kind of device is used, twelve pre-sealed edges need to be processed on the pressure transmission medium and six pressurization blocks are placed in the pressure transmission medium. Greater loss and higher production costs

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