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Conducting medium for high-stress and large-deformation environment, assembly part and application thereof

A conductive medium and assembly technology, applied in the application field of high-voltage experiments, can solve problems such as failure to rise, circuit resistance changes, and assembly compression deformation.

Active Publication Date: 2020-04-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-voltage devices are different, the purpose of the experiment is different, and the assemblies used are usually different, but these different assemblies have one thing in common: a conductive medium needs to be installed inside the assembly, and the high-voltage device heats the sample through the conductive medium or the original electrical properties Position measurement, in the prior art, a hard carbon column or metal wire is usually embedded in the assembly as a conductive medium, and when the high-voltage device pressurizes the assembly, as the pressure is loaded, the assembly compresses and deforms, and the carbon column or The metal wire is deformed or even broken under pressure, which will cause the circuit to be disconnected, or the resistance of some circuits will change. The pressure does not rise, it only affects the in-situ measurement of resistance in the pressure calibration experiment
The pressure can continue to be loaded, but the pressure value cannot be measured)

Method used

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  • Conducting medium for high-stress and large-deformation environment, assembly part and application thereof
  • Conducting medium for high-stress and large-deformation environment, assembly part and application thereof
  • Conducting medium for high-stress and large-deformation environment, assembly part and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1As shown, this embodiment provides an assembly for high-pressure experiments, which is a first-level assembly adapted to a six-sided top press, including a phyllolith block 1, a dolomite tube 2, and a dolomite ring 3 , carbon tube 4, carbon sheet 5, molybdenum cup 6, the leaf stone block 1 is a square leaf stone block 1, a cylindrical cavity is arranged in the leaf stone block 1, and plugs are arranged at the upper and lower ends of the cavity To block the channel, the dolomite tube 2 is set in the cylindrical cavity of the phyllite, and two dolomite rings 3 are respectively set at the upper and lower ends of the dolomite tube 2 to enclose the pressure cavity, and the conductive channel is two The inner circle of a dolomite ring 3; the carbon tube 4 is arranged in the pressure chamber, and the two carbon sheets 5 are respectively arranged on the upper and lower ends of the carbon tube 4, and the carbon tube 4 and the carbon sheet 5 form a heating chamber...

Embodiment 2

[0030] This embodiment provides a first-level standard pressure assembly of four-wire method, the purpose of which is to calibrate the sealing edge pressure of the first-level experiment. The principle is to calibrate the pressure achieved in the assembly by testing the resistance change of the standard pressure sample under high pressure. In this embodiment, the use of bismuth silk as the standard pressure material for standard pressure is taken as an example, such as Figures 2 to 4 As shown, the assembly adopts a square standard pressing block 13 made of phyllostone. The standard pressing block 13 is processed into upper and lower parts. Copper central conductive sheet 14a, one edge of the top of the superscript pressure block 13a is cut off, and the cut section is a triangular prism 13c, and four parallel conductive channels are drilled on the superscript pressure block 13a, and the four conductive channels are respectively formed by the edge The cut surface extends to a c...

Embodiment 3

[0034] This embodiment provides an assembly applied to an in-situ neutron diffraction device, such as Figure 5 , 6 As shown, the middle part of the sealing gasket 11 has a through hole through the sealing gasket 11 as the pressure cavity, the pyrolite ring 12 is arranged in the pressure cavity, and the grooves extending toward the sample chamber at the upper and lower ends of the sealing gasket 11 form a conductive cavity. Channel, the copper powder is pre-pressed under a pressure of 20MPa to form a conductive medium 7c suitable for the conductive channel, and the conductive medium 7c is installed in the conductive channel.

[0035] Taking the measurement of Bi (bismuth) sample electrical signal as an example, a constant current source is used to provide a constant current for the standard voltage circuit, and a multi-channel recorder is used to record the voltage change of the circuit. Because the upper and lower anvils of this device are electrically insulated from each ot...

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Abstract

The invention provides an assembly part for a stress and deformation environment. A to-be-tested sample and a conductive medium are arranged in the assembly part, one end of the conductive medium is connected with the sample, the other end of the conductive medium is conductively connected with the exterior of the assembly part, and the conductive medium and the assembly medium surrounding the conductive medium keep synchronous rheology in a stress and deformation environment. Conductor powder or a block which is formed by pre-pressing the conductor powder and can be rheological under high pressure is used as a conducting medium, the conducting medium is kept flowing and continuous in the high-temperature and high-pressure experiment process, and high-quality transmission of current and electric signals in the high-temperature and high-pressure experiment is realized by combining with dynamic high-pressure and static high-pressure experiment technologies.

Description

technical field [0001] The invention belongs to the technical field of high-voltage devices, and in particular relates to a conductive medium used in high-stress and large-deformation environments, an assembly equipped with the conductive medium and its application in high-voltage experiments. Background technique [0002] High-voltage extreme physical conditions will change the arrangement of atoms (molecules), causing changes in electronic polarization, electronic energy levels, etc., thereby changing the crystal structure, electrical transport performance, magnetic properties, and thermal conductivity of materials. High-voltage technology can be used to achieve Synthesis of functional materials, phase change analysis of materials, etc. In the prior art, common devices in the high-pressure field that can achieve high temperature and high pressure include double-sided top presses, six-sided top presses, six-eight type two-stage presses, and diamond presses. The anvil (DAC) ...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01N3/08G01N3/18G01N3/06G01N3/02
CPCG01N3/02G01N3/066G01N3/08G01N3/18G01N2203/0019G01N2203/0226G01N2203/0617G01R31/00
Inventor 贺端威张佳威
Owner SICHUAN UNIV
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