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High-performance multi-layer thin-mat composite thermal insulation material and manufacturing method thereof

A thermal insulation material and high-performance technology, which is applied in the field of high-performance composite thermal insulation materials and their preparation to achieve the effect of improving thermal insulation efficiency

Active Publication Date: 2013-12-18
海鹰空天材料研究院(苏州)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors have also found that a thin felt made from a fiber can only have the best thermal insulation performance in a certain temperature zone

Method used

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  • High-performance multi-layer thin-mat composite thermal insulation material and manufacturing method thereof
  • High-performance multi-layer thin-mat composite thermal insulation material and manufacturing method thereof
  • High-performance multi-layer thin-mat composite thermal insulation material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Example 1: Preparation of multi-layer thin felt composite heat insulation material at 1600°C

[0076] (1) Prepare 3 alumina fiber mats, aluminum silicate fiber mats, high silica fiber mats and basalt wool fiber mats each with a thickness of 3 mm, with a format size of 200 mm × 200 mm;

[0077] (2) Get three alumina fiber thin felts, two aluminum silicate fiber thin felts, high silica fiber thin felts and basalt cotton fiber thin felts, and lay layers in the airgel forming mold according to the above-mentioned sampling sequence;

[0078] (3) prepare alumina sol according to the ratio of aluminum sec-butoxide: ethanol: nitric acid: water=6.6: 20: 0.039: 1 (molar ratio), stir evenly and set aside;

[0079] (4) Inject the aluminum oxide sol prepared in step (3) into the mold with thin felt in step (2), close the mold to 25mm, gel, and age;

[0080] (5) Take out the wet gel in step (4), replace it with ethanol for solvent replacement, and finally supercritically dry to obta...

Embodiment 2

[0087] Example 2: Preparation of multi-layer thin felt composite heat insulation material at 1200°C

[0088] (1) Prepare 4 mullite fiber mats, high silica fiber mats and basalt cotton fiber mats each with a thickness of 3mm, with a format size of 200mm × 200mm;

[0089] (2) Get three pieces of mullite fiber thin felt, high silica fiber thin felt and basalt cotton fiber thin felt, and lay layers in the airgel forming mold according to the above-mentioned sampling sequence;

[0090] (3) Prepare silica sol according to the ratio of ethyl orthosilicate: ethanol: water: ammonia water: ammonium fluoride=1000: 1508: 340: 0.3: 0.1 (weight ratio), stir evenly and set aside;

[0091] (4) Inject the silicon oxide sol prepared in step (3) into the mold with thin felt in step (2), close the mold to 25mm, gel, and age;

[0092] (5) Take out the wet gel in step (4), replace it with ethanol for solvent replacement, and finally supercritically dry to obtain a multi-layer thin felt composite h...

Embodiment 3

[0098] Example 3: Preparation of multi-layer thin felt composite heat insulation material at 1000°C

[0099] (1) The preparation thickness is 5 pieces of high silica fiber thin felt and basalt cotton fiber thin felt each with a thickness of 3mm, and the format size is 200mm×200mm;

[0100] (2) Get five high-silica fiber thin felts and four basalt wool fiber thin felts, and lay layers in the airgel forming mold according to the above-mentioned sampling sequence;

[0101] (3) Prepare silica sol according to the ratio of ethyl orthosilicate: ethanol: water: ammonia water: ammonium fluoride=1000: 1508: 340: 0.3: 0.1 (weight ratio), stir evenly and set aside;

[0102] (4) Inject the silicon oxide sol prepared in step (3) into the mold with thin felt in step (2), close the mold to 25mm, gel, and age;

[0103] (5) Take out the wet gel in step (4), replace it with ethanol, and finally supercritically dry it to obtain a multi-layer thin felt composite heat insulation material for 1000...

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Abstract

The invention discloses a high-performance multi-layer thin-mat composite thermal insulation material and a manufacturing method of the high-performance multi-layer thin-mat composite thermal insulation material. The high-performance multi-layer thin-mat composite thermal insulation material is manufactured from multiple layers of thin mats, an infrared blocking agent and an aerogel material in a composite manner. The high-performance multi-layer thin-mat composite thermal insulation material is manufactured by laying multiple layers of the thin mats, the infrared blocking agent and aerogel grains of different content are filled into the thin mats, the aerogel grains are prepared from sol-gel with the combination of a supercritical drying mode, and the function that multiple layers of the thin mats are adhered together is also achieved. According to the difference of application temperature zones, the types of fibers and the types and the contents of the infrared blocking agents can be adjusted so as to obtain material combination with optimal thermal insulation property; the material is also good in forming property, and products of different shapes and sizes can be manufactured. Therefore, the material has significant application values in fields such as aerospace crafts, kiln heat preservation and efficient thermal insulation and prevention in an extreme environment.

Description

technical field [0001] The invention relates to the technical field of functional composite materials, in particular, the invention relates to a high-performance composite heat insulation material and a preparation method thereof. Background technique [0002] Airgel is a lightweight nanoporous material formed by the condensation of colloidal particles. The effect is greatly reduced, and at the same time, the accumulation of nanoparticles into an infinitely long path also effectively weakens the heat conduction effect of the solid. Based on the excellent inhibition effect of the airgel material on the solid and gaseous conduction, it is currently known as the lowest thermal conductivity. A solid material. Airgel materials have low density and poor network skeleton strength, so they cannot be used alone as thermal insulation materials. The use of matrix reinforcement technology to compound airgel particles into micron fiber mats greatly improves the mechanical properties of ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/24C04B14/38
Inventor 张凡宋寒刘斌苏力军詹万初
Owner 海鹰空天材料研究院(苏州)有限责任公司
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