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Diamond anvil cell sample locking apparatus and monitoring method thereof

A technology of diamond anvil and locking device, used in sampling device, measuring device, preparation of test samples, etc., can solve problems such as unreliability, strong initial pressure, incomplete sealing, etc., and achieve accurate driving force and operation. simple effect

Active Publication Date: 2016-04-27
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the operation in a closed container, the aforementioned method of determining whether it is locked under a microscope cannot be implemented. A workaround is to estimate in advance the number of rotations required for the press screw to lock the sample, but this does not It is inconvenient and unreliable, which is also the main reason why the diamond anvil fails to sample high-pressure gas samples. On the one hand, the number of turns of the pressure screw of the press is too small, which will cause incomplete sealing, and the high-pressure gas samples will be in normal pressure. On the other hand, in order to ensure a reliable seal, too much screwing will cause the initial pressure of the sample to be too high, and the experimental data of the low pressure section cannot be obtained.

Method used

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  • Diamond anvil cell sample locking apparatus and monitoring method thereof
  • Diamond anvil cell sample locking apparatus and monitoring method thereof
  • Diamond anvil cell sample locking apparatus and monitoring method thereof

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Embodiment 1

[0032] Such as figure 1 , 2 As shown, the diamond pair anvil sample locking device includes a diamond pair anvil 10 that locks the diamond pair anvil sample, and a driving device that drives the diamond pair anvil 10 to perform a pressing action. A force sensor 40 for measuring the driving force is provided between the diamond counter anvil 10 . The present invention can collect and monitor in real time the pressure applied by the driving device to the anvil 10 by the force sensor 40. The force sensor 40 can be connected with a computer equipped with acquisition software through an acquisition card or a single-chip microcomputer circuit. According to the force sensor 40 The collected driving force situation determines whether the driving device needs to continue the pressure application operation. For example, the pressure application operation can be stopped when the initial driving force of the diamond for locking the anvil sample reaches the set driving force.

[0033] Th...

Embodiment 2

[0037] The invention relates to a monitoring method for locking an anvil sample by using the above-mentioned locking device.

[0038] Utilize the driving device to apply pressure to the diamond anvil 10, and control whether the pressing operation of the driving device ends according to the data collected by the force sensor 40;

[0039]The collected data of the force sensor 40 includes T 1 , T 2 , T 3 , T 4 Data from four stages:

[0040] where T 1 Phase data: The force sensor in the high-pressure gas will be subjected to a certain pre-stress, and the force is a constant value. In actual operation, the acquisition software can reset it to facilitate subsequent calculations.

[0041] where T 2 Stage data: With the tightening of the compression screw 31, the compression screw 31 begins to exert pressure on the diamond anvil 10, but because the diamond is in a tight fit state with the upper and lower parts of the anvil 10, that is, the piston 15 and the guide cylinder 14 ,...

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Abstract

The invention relates to the field of ultrahigh pressure physical experiments, and concretely relates to a diamond anvil cell sample locking apparatus and a monitoring method thereof. The diamond anvil cell sample locking apparatus comprises a diamond anvil cell for locking a sample and a driving device for driving the diamond anvil cell to enforce compacting motion, and a force sensor used for measuring driving force is arranged between the driving device and the diamond anvil cell. The apparatus can acquire and monitor the diamond anvil cell pressure application condition of the driving device through the force sensor, and can judge that whether the driving device continuously applies pressure or not according to the driving force condition acquired by the force sensor, such as the pressure application can be stopped when the diamond anvil cell sample locking initial driving force reaches preset driving force.

Description

technical field [0001] The invention relates to the field of ultra-high pressure physical experiments, in particular to a diamond-to-anvil sample locking device and a monitoring method thereof. Background technique [0002] The diamond counter-anvil is the key equipment used in the field of ultra-high pressure physics experiments to study the properties of matter under million atmospheres. The working principle of the diamond counter-anvil is to use a pair of diamonds with extremely small tables (generally on the order of tens of microns in diameter) to mechanically squeeze the sample to generate a high-pressure environment. Between the extrusion surfaces formed by the two diamond tables Place a metal gasket with a pre-processed sample hole, the sample is placed in the sample hole, the diameter of the sample hole is about one-third of the diameter of the diamond table. The diamond anvil is mainly composed of two parts, that is, a pair of diamonds that are in direct contact ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/22
CPCG01N1/22G01N1/286G01N2001/2238
Inventor 蒋华超王媛肖令平张慧超杨雪曾雉陈晓嘉
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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