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Diamond pressure cavity dynamic loading device and assembling, loading and unloading method

A diamond pressure chamber and dynamic loading technology, which is applied in the direction of measuring devices, using stable tension/pressure to test the strength of materials, instruments, etc., can solve the problems that three controllers cannot be guaranteed to work at the same time, the diamond is offset, and the diamond is damaged. , to achieve the effects of preventing long loading time, cost saving, and convenient installation

Pending Publication Date: 2021-11-23
王磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The dynamic loading devices driven by the above two kinds of piezoelectric ceramics all use three piezoelectric ceramic drivers, and the operation process requires three piezoelectric controllers to operate. Delay, causing the force on the diamond to shift and risk damaging the diamond

Method used

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  • Diamond pressure cavity dynamic loading device and assembling, loading and unloading method
  • Diamond pressure cavity dynamic loading device and assembling, loading and unloading method
  • Diamond pressure cavity dynamic loading device and assembling, loading and unloading method

Examples

Experimental program
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Embodiment 1

[0037] As mentioned in the background technology, in view of the problems in the prior art, this application proposes a dynamic loading device for the diamond pressure chamber, such as figure 1 As shown, it includes: a cylindrical piezoelectric ceramic 2, a loading body is provided on the side relatively close to the piston part 5, including a sleeve part 1 with a hollow cavity for placing the piezoelectric ceramic 2 and connected to the The pressing part 3 at one end of the sleeve part 1 is used to limit the movement of the piezoelectric ceramic 2 in a direction away from the cylindrical part 6; the other end of the sleeve part 1 is connected to the The cylindrical part 6 is threaded; the piezoelectric ceramic 2 is placed coaxially with the diamond cavity; the signal sending device is used to send a driving signal to the piezoelectric ceramic 2 through a conductive component, so that the piezoelectric ceramic 2 It expands and contracts along the axial direction of the diamond...

Embodiment 2

[0057] A kind of diamond chamber dynamic loading device comprising embodiment 1, the assembly steps are as follows:

[0058] The piezoelectric ceramic 2 is placed axially in the sleeve part 1 along the diamond cavity, and the wire 8 is led out through the through hole of the sleeve part 1;

[0059] Screw the pressing part 3 to the small radius part 11, and tighten the pressing part 3 so that it is in close contact with the piezoelectric ceramic 2;

[0060] placing the insulating gasket 4 in the sleeve part 1;

[0061] Thread the sleeve part 1 to the cylindrical part 6 of the diamond pressure chamber, and tighten the cylindrical part 6, so that the diamond pressure chamber, the insulating gasket 4 and the pressure chamber The electric ceramics 2 are in close contact, and the assembly is completed, forming a columnar coaxial assembly.

Embodiment 3

[0063] A kind of diamond chamber dynamic loading device comprising embodiment 1 and embodiment 2, the fast loading steps are as follows:

[0064] The wire 8 is connected to the signal generator; the signal generator is connected to a power transmitter;

[0065] Set the initial pressure value of fast loading;

[0066] adjusting the power amplifier of the piezoelectric ceramic 2 so that it is at a maximum voltage;

[0067] sending a driving signal to the piezoelectric ceramic 2 through the signal generator;

[0068] The piezoelectric ceramic 2 receives the drive signal, stretches rapidly, and the instantaneous pressure is applied to the piston part 5 of the diamond pressure chamber, and the piston part 5 moves to the cylindrical part 6, and the sample end Generates fast dynamic loading forces.

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Abstract

The invention provides a diamond pressure cavity dynamic loading device and an assembling, loading and unloading method, a diamond pressure cavity is provided with a piston part and a cylinder part, and the cylinder part is provided with an external thread; the diamond pressure cavity dynamic loading device comprises a cylindrical piezoelectric ceramic; a loading body is arranged on the side relatively close to the piston part, the loading body comprises a sleeve part and a pressing part, the sleeve part is provided with a hollow cavity used for containing the piezoelectric ceramic, the pressing part is connected to one end of the sleeve part, and the pressing part is used for limiting the piezoelectric ceramic to move in the direction away from the cylinder part; the other end of the sleeve part is in threaded connection with the cylinder part; the piezoelectric ceramic and the diamond pressing cavity are coaxially arranged; and a signal sending device which is used for sending a driving signal to the piezoelectric ceramic through a conductive assembly so that the piezoelectric ceramic stretches out and draws back in the axis direction of the diamond pressing cavity.

Description

technical field [0001] The present application relates to the technical field of high-voltage testing devices, and in particular to a dynamic loading device for a diamond pressure chamber and methods for assembling, loading and unloading. Background technique [0002] There is a diamond counter-anvil in the diamond pressure chamber. The diamond counter-anvil device has unique advantages in applying ultra-high pressure to tiny samples, and is a very powerful experimental method. The Livermore (LLNL) laboratory in the United States designed a dynamically loaded diamond pressure chamber (dDAC) that can be used in the laboratory. The device uses three piezoelectric ceramics to reversely compress the diamond pressure chamber. It is reported that the maximum loading speed is 500GPa / s, and successfully realizes dynamic loading with a strain rate of more than 1000 in the hydrostatic diamond pressure chamber. The Institute of High Energy Physics, Chinese Academy of Sciences in China...

Claims

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Application Information

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IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0019
Inventor 王磊
Owner 王磊