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A rare earth-based aerogel material with radiation shielding effect and thermal insulation performance and its preparation and application

A rare earth-based, aerogel technology, applied in applications, ceramic products, household appliances, etc., can solve the problems of poor flame retardancy and single function, and achieve excellent heat insulation performance, high chemical stability, and low thermal conductivity Effect

Active Publication Date: 2022-07-01
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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  • A rare earth-based aerogel material with radiation shielding effect and thermal insulation performance and its preparation and application
  • A rare earth-based aerogel material with radiation shielding effect and thermal insulation performance and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This embodiment specifically prepares a composite aerogel material of europium zirconate and silica aerogel matrix material, and the preparation includes the following steps:

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

[0065] (2) adding 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 ethyl orthosilicate;

[0067] (4) under continuous stirring, the above solution was added dropwise with 0.5M aqueous ammonia solution, adjusted 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, indicat...

Embodiment 2

[0077] This embodiment specifically prepares a composite aerogel material of europium zirconate and alumina aerogel matrix material, and the preparation includes the following steps:

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

[0079] (2) adding 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-mentioned mixed solution to a glass petri dish and let stand until it is completely gelled;

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

[0083] (6) the gel after the above-mentioned aging is immersed in n-hexane, ...

Embodiment 3

[0088] This embodiment specifically prepares a composite aerogel material of europium zirconate and zirconia aerogel matrix material, and the preparation includes the following steps:

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

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

[0091] (3) adding 0.5mol of network-inducing agent propylene oxide in the above-mentioned mixed solution, and continuously stirring and mixing uniformly;

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

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

[0094] (6) Transfer the gel after the above-mentioned a...

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Abstract

The invention provides a rare earth-based aerogel material with both radiation shielding effect and thermal insulation performance, and preparation and application thereof. The material includes an aerogel matrix material and a rare-earth-based material. The gel matrix material is composited, and the rare earth base material is selected from one or more of rare earth zirconate, rare earth titanate, rare earth tungstate, and rare earth ceria; wherein, the content of the rare earth base material is 1wt% to 45wt% %. The invention effectively combines radiation shielding and fire-proof, heat-insulation and heat-preservation properties through the compounding of rare earth-based materials in aerogel, and the prepared material is particularly suitable for radiation shielding and fire-proof, heat-insulation and heat preservation requirements in the field of nuclear engineering.

Description

technical field [0001] The invention belongs to the technical field of nano-porous thermal insulation materials and their preparation, in particular to a rare earth-based aerogel material with radiation shielding effect and thermal insulation performance, and a preparation method and application thereof. Background technique [0002] The nuclear reactor loop system (including the primary loop system and the secondary loop system, etc.) generally needs to be provided with a radiation shielding layer and a thermal insulation layer. Heat loss, 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 to introduce rare earth elements into radiation shielding layers to replace the above-mentioned traditional materials, mainly based on the fact ...

Claims

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Application Information

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Patent Type & Authority Patents(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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