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Rare-earth-based aerogel material with radiation shielding effect and heat insulation property as well as preparation and application of rare-earth-based aerogel material

A rare earth-based, aerogel technology, used in applications, household appliances, ceramic products, etc., can solve problems such as poor flame retardant performance and single function

Active Publication Date: 2019-12-13
XIAMEN INST OF RARE EARTH MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still defects such as poor flame retardancy and single function.

Method used

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  • Rare-earth-based aerogel material with radiation shielding effect and heat insulation property as well as preparation and application of rare-earth-based aerogel material
  • Rare-earth-based aerogel material with radiation shielding effect and heat insulation property as well as preparation and application of rare-earth-based aerogel material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This embodiment specifically prepares an airgel material composited with europium zirconate and silica airgel matrix material, and its preparation includes the following steps:

[0064] (1) Preparation of precursor mixed solution: disperse 249mg europium nitrate and 240mg zirconium nitrate (molar ratio is 1:1) into a mixed solution of 8.4mL tetraethyl orthosilicate, 17.52mL ethanol, 2.54mL water (molar ratio is 1:8:3.75);

[0065] (2) Add 200 μL of concentrated hydrochloric acid dropwise to the mixed solution prepared above under continuous stirring until the metal salt is completely dissolved;

[0066] (3) leave standstill for 24 hours to completely hydrolyze tetraethyl orthosilicate;

[0067] (4) Add 0.5M ammonia solution dropwise to the above solution under continuous stirring, and adjust to pH=5.8;

[0068] (5) Transfer the above-mentioned sol to a glass petri dish, and let it stand at room temperature until it loses fluidity, indicating that it has completely gel...

Embodiment 2

[0077] This embodiment specifically prepares an airgel material composited with europium zirconate and alumina airgel matrix material, and its preparation includes the following steps:

[0078] (1) Preparation of precursor mixed solution: mix 249mg europium nitrate, 240mg zirconium nitrate and 9.538g aluminum chloride hexahydrate with 23mL ethanol and 7.1mL water;

[0079] (2) Add 200 μL of concentrated hydrochloric acid dropwise to the mixed solution prepared above under continuous stirring until the metal salt is completely dissolved;

[0080] (3) Add network inducer propylene oxide (n (环氧丙烷) :n (Al) =9mol:1mol);

[0081] (4) Transfer the above mixed solution to a glass petri dish and let it stand until it is completely gelled;

[0082] (5) Submerge the above-mentioned gel in ethanol, and leave it in a constant temperature water bath at 60°C for 48 hours for aging;

[0083] (6) Submerge the gel after the above-mentioned aging in n-hexane, and replace the solvent several ...

Embodiment 3

[0088] This embodiment specifically prepares an airgel material composited with europium zirconate and zirconia airgel matrix material, and its preparation includes the following steps:

[0089](1) Preparation of precursor mixed solution: 762mg of europium nitrate and 11.56g of zirconyl nitrate were added to the mixed solution of 20mL ethanol / 5mL water;

[0090] (2) The above-mentioned mixed solution is continuously stirred until europium nitrate and zirconium oxynitrate are completely dissolved;

[0091] (3) Add 0.5mol network inducer propylene oxide in the above mixed solution, keep stirring and mix evenly;

[0092] (4) Transfer the above mixed solution to a glass petri dish and let it stand until it is completely gelled;

[0093] (5) Submerge the above-mentioned gel in ethanol, and leave it in a constant temperature water bath at 60°C for 48 hours for aging;

[0094] (6) Transfer the above-mentioned gel after aging to 100 mL, 10% (v / v) trimethylchlorosilane n-hexane solut...

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Abstract

The invention provides a rare-earth-based aerogel material with a radiation shielding effect and heat insulation property and preparation and application of the rare-earth-based aerogel material. Thematerial comprises an aerogel matrix material and a rare-earth-based material, wherein the rare-earth-based material is compounded with the aerogel matrix material; the rare-earth-based material is selected from one or more of rare earth zirconate, rare earth titanate, rare earth tungstate and rare earth cerate; and the content of the rare-earth-based material ranges from 1wt% to 45wt%. The radiation shielding property and the fireproof heat insulation property are effectively combined by compounding the rare-earth-based material in aerogel, and the prepared material particularly meets the requirements of radiation shielding and fireproof heat insulation in the field of nuclear engineering.

Description

technical field [0001] The invention belongs to the technical field of nanoporous thermal insulation material and its preparation, in particular to a rare earth-based airgel material with both radiation shielding effect and thermal insulation performance, its preparation method and application. Background technique [0002] In the nuclear reactor circuit system (including the primary circuit system and the secondary circuit system, etc.), a radiation shielding layer and a thermal insulation layer are generally required to be installed. Reduce heat loss and improve energy utilization. [0003] The main materials selected in the traditional radiation shielding layer are lead (Pb), boron-10 ( 10 B) and cadmium (Cd), where, 10 B and Cd are mainly used in nuclear reactor control rods and protective screens. In recent years, some studies have proposed introducing rare earth elements into the radiation shielding layer to replace the above-mentioned traditional materials, mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B38/00C04B111/28
CPCC04B30/00C04B2201/20C04B2201/32C04B2111/00862C04B2111/28C04B14/064C04B14/36C04B38/0067C04B38/0074C04B38/0045C04B14/302C04B14/303C04B14/306
Inventor 杨帆赵志钢白瑞熙
Owner XIAMEN INST OF RARE EARTH MATERIALS
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