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Radiation shielding composite material including radiation absorbing material and method for preparing the same

A radiation-absorbing and radiation-shielding technology, applied in the field of radiation-shielding composite materials, can solve problems such as increased costs and unsuitable shielding components

Active Publication Date: 2015-06-10
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, large amounts of boride increase cost, and thicker shielding components may not be suitable for some applications such as protective clothing or masks

Method used

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  • Radiation shielding composite material including radiation absorbing material and method for preparing the same
  • Radiation shielding composite material including radiation absorbing material and method for preparing the same
  • Radiation shielding composite material including radiation absorbing material and method for preparing the same

Examples

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preparation example Construction

[0040] Preparation method of radiation absorbing material

[0041] Figure 5 For the preparation of exemplary embodiments figure 1 A flowchart of a method of radiation absorbing material 110 is shown. In this embodiment, the foreign element 140 is boron. In addition, the carrier 130 of this embodiment is carbon nanotubes.

[0042] When the heterogeneous element 140 is boron, at least one of the following methods can be used to form boron: solid boron precursor, liquid boron precursor, and gaseous boron precursor. Examples of solid boron precursors include boron oxide (B 2 o 3 ), boron carbide (B 4 C), boron nitride (BN), boric acid (H 3 BO 3 ), or any other boron-containing compound. Examples of liquid boron precursors include aqueous boric acid (H 3 BO 3(aq) ), triethyl borate (C 6 h 15 BO 3 ), or the like. Examples of gaseous boron precursors include triethylborane ((C 2 h 5 ) 3 B), boron trichloride (BCl 3 ), diborane (B 2 h 6 ),etc.

[0043] When the ...

Embodiment 1

[0065] Embodiment 1 (preparation of boron-doped carbon nanotubes)

[0066] For sample preparation without pretreatment, first mix boron oxide (B 2 o 3 ) powder and pristine multi-walled carbon nanotubes (MWCNTs) to prepare reactants. The molar ratio of boron to carbon in the reactants may be between 1 and 10. If the molar ratio of boron to carbon is less than 1, boron cannot be effectively doped into MWCNT. If the molar ratio of boron to carbon is greater than 10, most boron is wasted due to insufficient MWCNTs.

[0067] For sample preparation with pretreatment process, first dissolve boron oxide into deionized water at 80°C for pretreatment process. Then pristine MWCNTs were slowly added into deionized water to form a slurry solution. The molar ratio of boron to carbon in the slurry solution can be between 1 and 10. The solution was continuously and uniformly stirred with a magnet, and the rotation speed of the magnet was 450 rpm. The solution containing pristine MWCNT...

Embodiment 2

[0078] Embodiment 2 (preparation of boron-doped nanomaterials)

[0079] The preparation method of this example is similar to Example 1, the difference is that the MWCNT carrier is replaced by various other carriers. Table 2 summarizes samples 30 to 35 prepared using different nanomaterials as supports.

[0080] Table 2

[0081]

[0082] Samples 30, 33, 34, and 35 have very high boron content (greater than 30 at%) and are suitable for neutron absorption and shielding applications.

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Abstract

A radiation absorbing material includes a carrier, and a heterogeneous element doped in the carrier. A content of the heterogeneous element in the carrier is higher than 15 atomic percent (at %).

Description

[0001] This application claims the benefit of US Provisional Application No. 61763178, filed February 11, 2013, and US Patent Application No. 14145703, filed December 31, 2013, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention relates to radiation shielding composites, and more particularly to radiation shielding composites comprising radiation absorbing materials. Background technique [0003] Radiation refers to the process in which electromagnetic waves of the full electromagnetic spectrum and particles of energy (both atomic and subatomic) pass through a medium. Radiation is broadly classified into ionizing radiation and non-ionizing radiation. Neutron radiation is a type of ionizing radiation consisting of free neutrons. Neutron radiation is more biologically harmful to humans than other ionizing radiation such as highly destructive X-rays or gamma radiation. Therefore, it is necessary to provide neutron ...

Claims

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Application Information

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IPC IPC(8): G21F1/02
CPCG21F1/02G21F1/08G21F3/00B29C45/0001G21F1/103B05D1/02B05D1/18
Inventor 江伟宏黄淑娟张光伟
Owner IND TECH RES INST
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