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Neutron shielding protection material

A shielding protection, neutron technology, applied in shielding, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problem of reducing the sub-shielding effect, etc., to extend service life, improve thermal conductivity, and improve reliability. sexual effect

Active Publication Date: 2018-11-23
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This adjustment is generally performed by an automatic device, but if the boron carbide shielding material is doped with other elements, the neutron shielding effect will be reduced

Method used

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  • Neutron shielding protection material

Examples

Experimental program
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Effect test

Embodiment

[0034] A neutron shielding protection material, including a base layer obtained from pure boron carbide material, the special feature is that the surface of the base layer is also combined to form a surface layer with a higher thermal conductivity than the base layer.

[0035] In this way, the base layer of this material is obtained from pure boron carbide material, which can ensure a good neutron shielding effect. At the same time, the surface of the base layer forms a surface layer with high thermal conductivity due to the combination, so it can rely on the surface layer with high thermal conductivity. The heat of the base layer is conducted and dissipated outwards, thereby preventing performance degradation of the base layer due to excessive temperature. Therefore, this material not only has a good neutron shielding effect, but also has a good anti-high temperature effect. The heat dissipation method is adopted to improve the heat dissipation effect of the material itself, t...

experiment example 1

[0058] Experimental Example 1: Under the premise of meeting the requirements of the above examples, 389.9 mg of boron carbide powder, 10.05 mg of graphene powder, 355.1 mg of boron carbide, 10.05 mg of graphene, and 8.5 mg of carbon nanotubes were added to the alcohol solution and dispersed uniformly by ultrasonic 60 minutes, stirring on an electromagnetic stirrer for 30 minutes, and ball milling for 2 hours at a speed of 150 r / min. Among them, the carbon nanotubes are the second non-hydroxylated multi-walled carbon nanotubes, the tube walls of which are more complete and do not contain a large number of functional groups, especially hydrogen-containing functional groups. Stir and dry the homogeneously mixed solution on a magnetic stirrer. The base layer of the regrinding tool is covered with pure boron carbide powder, the middle layer is covered with mixed powder of boron carbide and graphene, and the surface layer is covered with mixed powder of boron carbide, graphene and c...

experiment example 2

[0060]Experimental Example 2: Under the premise of meeting the requirements of the above examples, 365.4 mg of boron carbide powder, 15.22 mg of graphene powder, 365.4 mg of boron carbide, 10.45 mg of graphene, and 15.5 mg of carbon nanotubes were added to the alcohol solution and dispersed uniformly by ultrasonic 90 minutes, stirred on an electromagnetic stirrer for 30 minutes, and ball milled for 3 hours at a speed of 200 r / min. Among them, the carbon nanotubes are selected from the first hydroxylated multi-wall carbon nanotubes, and a large number of hydroxyl functional groups are attached to the tube walls. Stir and dry the homogeneously mixed solution on a magnetic stirrer. The base layer of the regrinding tool is covered with pure boron carbide powder, the middle layer is covered with mixed powder of boron carbide and graphene, and the surface layer is covered with mixed powder of boron carbide, graphene and carbon nanotubes. It is pre-pressed into a blank and dried, an...

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Abstract

The invention discloses a neutron shielding protection material. The material comprises a base layer prepared from pure boron carbide materials and is characterized in that a surface layer with the thermal conductivity rate higher than that of the base layer is formed on and bonds with the surface of the base layer. The base layer is prepared from the pure boron carbide materials, a good neutron absorption shielding effect can be ensured, due to the fact that the surface layer with higher thermal conductivity rate is formed on and bonds with the surface of the base layer, the surface layer with higher thermal conductivity rate can be utilized to conduct and dissipate heat of the base layer to the outside, and it can be avoided that the performance of the base layer is reduced due to the excess temperature. The material has a good neutron absorption shielding effect and a good high-temperature resistance effect, a thermal throttling mode is adopted, the self-heat-dissipating effect of the material is improved, and it is further avoided that due to the excess using temperature of the material, the thermal ageing phenomenon is worsened, the mechanical property is reduced, and the reduced intensity causes cracks.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation material shielding, in particular to a neutron shielding protection material. Background technique [0002] Nuclear power generation technology is a technology that uses nuclear fuel, such as uranium-235, etc., to drive friction through the energy generated by nuclear fission, thereby generating electricity. At present, due to the depletion of traditional energy sources, nuclear power technology, as a clean energy source, has been paid more and more attention. In nuclear power technology, a very important part is the need to consider the use of shielding materials to prevent radiation pollution. [0003] Boron carbide (B4C) is a material with excellent properties, usually gray-black micro-powder. The atomic radii of C and B in boron carbide are very close, and the difference in electronegativity between the two is very small, forming a strong common bond. Valence bond, the ratio of cov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F1/06G21F1/12B82Y30/00C04B35/563C04B35/622
CPCG21F1/06G21F1/12B82Y30/00C04B35/563C04B35/622C04B2235/5288C04B2235/425
Inventor 齐福刚王冰刘利新欧阳晓平赵镍刘应都曹红帅李贝贝
Owner XIANGTAN UNIV
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