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Heat-insulation shielding aerogel, heat-insulation shielding material and preparation method and application of heat-insulation shielding aerogel and heat-insulation shielding material

A thermal shielding and aerogel technology, applied in the field of shielding materials, can solve the problems of inability to use in high temperature environment, easy deformation and melting, etc., and achieve the effect of excellent thermal insulation performance

Active Publication Date: 2022-03-08
NO 719 RES INST CHINA SHIPBUILDING IND
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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the polymer-based composite material used for nuclear radiation protection in the prior art is easily deformed and melted at high temperature, and cannot be used in a high-temperature environment, thereby providing a heat-insulating shielding air condensation Adhesive, heat insulation shielding material, preparation method and application thereof

Method used

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  • Heat-insulation shielding aerogel, heat-insulation shielding material and preparation method and application of heat-insulation shielding aerogel and heat-insulation shielding material

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Embodiment 1

[0028] This embodiment provides a method for preparing a heat-insulating shielding material, the steps are as follows:

[0029] (1) Mechanically stir and mix ethyl orthosilicate (1mol), ethanol (17mol) and distilled water (3mol), add hydrochloric acid (0.0005mol) during the stirring process, stir at a temperature of 30°C, and stir for a total of 2 hours. After the stirring is completed Seal and stand for 7h to form SiO 2 Sol;

[0030] (2) Add boron carbide (0.0037mol) and ammoniacal liquor (0.001mol) to the SiO2 sol obtained in step (1) during the stirring process, the stirring temperature is 30°C, the stirring time is 2h, and the stirring is stopped when the gel is about to be obtained to obtain B 4 C / SiO 2 Sol;

[0031] (3) Add the fiberglass mat with a thickness of 10mm in the plastic mold, pour the B obtained in step (2) 4 C / SiO 2 The sol was used to ensure that the glass fiber mat was completely soaked, and after aging for 2 days at 55° C., a heat-insulating shieldin...

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Abstract

The invention provides heat-insulation shielding aerogel, a heat-insulation shielding material and a preparation method and application thereof, and relates to the field of shielding materials. The heat-insulation shielding aerogel provided by the invention is formed by mixing and processing functional shielding particles such as tetraethoxysilane and boron carbide, tetraethoxysilane is used as a matrix material of the aerogel, boron carbide is used as a thermal neutron absorber, and a heat-insulation shielding material prepared from the aerogel and a fiber preform has excellent heat-insulation performance and high-temperature stability; and meanwhile, the neutron shielding material also has certain anti-radiation performance and is suitable for neutron shielding in a high-temperature environment.

Description

technical field [0001] The invention relates to the field of shielding materials, in particular to a heat-insulating and shielding airgel, a heat-insulating and shielding material, and a preparation method and application thereof. Background technique [0002] With the development and application of nuclear technology, nuclear energy has been widely used in nuclear power, nuclear powered ships, non-destructive testing, radiation therapy and other industries. Nuclear reactors, accelerators and other radioactive sources will produce nuclear radiation during operation, especially neutron radiation, which has strong penetrating power and will pose a huge threat to personnel and equipment. The resulting radiation safety and protection problems are becoming more and more serious. more important. [0003] Polymer-based composite materials have been increasingly used in the field of nuclear radiation protection due to their light weight, good processability, and wide range of perfo...

Claims

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Application Information

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IPC IPC(8): C04B30/02C04B38/00G21F1/10
CPCC04B30/02G21F1/103C04B2111/00862C04B14/064C04B14/323C04B14/42C04B38/0045
Inventor 徐晓辉李晓玲聂凌霄李文博余明
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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