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Novel superconducting material and preparation method thereof

A superconducting material and a new technology, applied in the field of new superconducting materials and their preparation, can solve problems such as high pressure

Active Publication Date: 2019-08-30
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of excessive pressure required for the hydrogen-based superconductor in the prior art, the present invention provides a new type of superconducting material that can obtain superconducting transformation under a relatively low pressure of 20-80GPa and its preparation method

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  • Novel superconducting material and preparation method thereof
  • Novel superconducting material and preparation method thereof

Examples

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preparation example Construction

[0029] An embodiment of the present invention provides a method for preparing a novel superconducting material, comprising: providing beryllium powder and carbon-based hydride, and performing pressurized treatment on the beryllium powder and carbon-based hydride under airtight conditions.

[0030] Further, the carbon-based hydride is methane.

[0031] During the preparation process, the material ratio of the beryllium powder and the carbon-based hydride can be any value. In the novel superconducting material obtained, the ratio of the amount of substance of beryllium atom to carbon-based hydride molecule is 1:1, so when providing raw materials, the ratio of substance of beryllium powder and carbon-based hydride is preferably 1: 1.

[0032] Further, in order to obtain a shaped product, the beryllium powder is pre-pressed first, and the beryllium powder is pressed into a sheet and then pressurized and pressed.

[0033] Further, a diamond counter-anvil is used as a pressure dev...

Embodiment 1

[0044] Beryllium powder with a purity of 99.9% from Alfa Aisha (China) Chemical Co., Ltd. was used as the powder sample. The powder sample was pre-compressed, and the thickness of the obtained sample sheet was about 20 μm.

[0045] The diamond anvil is used as the pressure device, the schematic diagram is shown in figure 1 , using rhenium sheet 11 as the gasket, helium as the pressure transmission medium, and the diameter of the anvil is 300 μm, the ruby ​​ball 111 is placed in the sample cavity of the diamond anvil as the pressure internal standard, and the movement of the fluorescence peak of the ruby ​​under pressure is used to calibrate the pressure.

[0046]Use a diamond anvil to press a dent on the rhenium sheet, with a pre-compression pressure of 15GPa, then punch a hole in the center of the indentation, place the sample sheet 112 in the center of the hole, and then use the gas sealing device to fill with methane to control the flow of methane and The amount of substa...

Embodiment 2

[0051] The similarities between this embodiment and Embodiment 1 will not be repeated here, and only the differences between this embodiment and Embodiment 1 will be described. and methane to apply a pressure of 40GPa to obtain a new type of superconducting material.

[0052] The crystal structure of the new superconducting material prepared in this example is as follows: Figure 5 shown. Depend on Figure 5 It can be seen that the novel superconducting material is composed of beryllium atoms and methane molecules in equal amounts, and its chemical formula is Be 3 (CH 4 ) 3 .

[0053] The electronic density of state spectrum of the above-mentioned new superconducting materials is as follows: Figure 6 as shown, Figure 6 The metallization features of this new superconducting material are shown.

[0054] Under the pressure of 40GPa, the above-mentioned new superconducting material can realize superconducting transition at a temperature of 13.3K. That is to say, under t...

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Abstract

The invention discloses a novel superconducting material and a preparation method thereof. The novel superconducting material is prepared by pressurizing metal beryllium powder and methane, and the molecular formula of the novel superconducting material is Be<n>(CH<4>)<n>, wherein n is greater than or equal to 2. The preparation method of the novel superconducting material provided by the invention comprises the following steps: providing beryllium powder and a carbon-based hydride, and carrying out pressurization pressing treatment on the beryllium powder and the carbon-based hydride under aclosed condition. The novel superconducting material can obtain superconducting transition at a relatively low pressure of 20-80 GPa, and the problem that the required pressure of an existing hydrogen-based superconductor is too large is solved. The preparation method of the novel superconducting material is simple and efficient and can be well applied to industrial production.

Description

technical field [0001] The invention relates to the technical field of superconducting materials, in particular to a novel superconducting material and a preparation method thereof. Background technique [0002] Superconducting materials play an important role in the fields of energy, information electronics, and quantum devices because of their characteristic that the resistance will disappear at a certain temperature. At present, superconducting materials can be roughly divided into traditional superconductors, copper-based superconductors, iron-based superconductors, interface superconductors, organic superconductors, hydrogen-based superconductors, etc. Among them, hydrogen-based superconductors are regarded as one of the most promising high-temperature superconductors. The working pressure is too high (usually higher than 150GPa), it is difficult to achieve under laboratory conditions, so it cannot be applied on a large scale. [0003] What the present invention aims t...

Claims

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Application Information

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IPC IPC(8): C07F3/00
CPCC07F3/006
Inventor 吕海燕钟国华陈明李文杰杨春雷
Owner SHENZHEN INST OF ADVANCED TECH
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