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Stitched laminar flexible heat insulation material and preparation method thereof

A flexible thermal insulation material, layered technology, applied in the field of stitched layered flexible thermal insulation materials and its preparation, can solve the problem of no thermal protection stitched composite materials, to improve the volume fraction and interlayer shear performance, and inhibit the expansion , the effect of meeting the heat insulation requirements

Active Publication Date: 2015-05-06
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The suture composite materials mentioned above are mostly used in normal temperature or medium and low temperature service conditions, and there is no suture composite material for thermal protection at 1600 °C

Method used

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  • Stitched laminar flexible heat insulation material and preparation method thereof
  • Stitched laminar flexible heat insulation material and preparation method thereof
  • Stitched laminar flexible heat insulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Mix 65g of alumina fiber with 4550g of deionized water, and use a high-speed stirrer to stir and mix at 400r / min for 5min to obtain alumina fiber slurry;

[0046] Add 8g of polyacrylamide solution with a concentration of 40wt% to the obtained alumina fiber slurry, stir and disperse the slurry at a speed of 1000r / min for 5min to obtain a uniformly dispersed mixed slurry; adding a dispersant can make the alumina The fiber dispersion is more uniform, and the degree of agglomeration of alumina fibers is low at a speed of 1000r / min, and the dispersion is uniform.

[0047] The obtained mixed slurry is subjected to suction and dehydration treatment with a suction molding machine to obtain alumina fiber paper 1 with a thickness of 2±0.5mm, which is easy to control the size and facilitate subsequent processing; the suction vacuum degree is 0.08-1.0 MPa, the size of filter cloth is 380×780mm 2 ;

[0048] Graphite paper 2 is subjected to vacuum pre-oxidation treatment, wherein t...

Embodiment 2

[0053] Mix 65g of alumina fiber with 5200g of deionized water, and use a high-speed stirrer to stir and mix at 1000r / min for 5min to obtain alumina fiber slurry;

[0054] Add 10 g of a polyacrylamide solution with a concentration of 60 wt % to the obtained alumina fiber slurry, and stir and disperse the slurry at a speed of 1000 r / min for 5 minutes to obtain a uniformly dispersed mixed slurry;

[0055] Use a suction forming machine to filter and dehydrate the obtained mixed slurry to obtain alumina fiber paper with a thickness of 2±0.5mm; the vacuum degree of suction is 0.08-1.0MPa, and the size of the filter cloth is 380×780mm 2 ;

[0056] Graphite paper is subjected to vacuum pre-oxidation treatment, wherein the vacuum pre-oxidation treatment is raised to 1200 °C at a heating rate of 5 °C / min, kept for 1 hour and then cooled with the furnace;

[0057] The aluminum phosphate solution with a solid content of 40wt% is used to bond the alumina fiber paper and the graphite paper...

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Abstract

The invention discloses a stitched laminar flexible heat insulation material and a preparation method thereof, wherein the stitched laminar flexible heat insulation material comprises an aluminum oxide fiber-graphite composite layer and two pieces of carbon fiber cloth, wherein the aluminum oxide fiber-graphite composite layer is formed by sticking a plurality of pieces of aluminum oxide fiber paper and a plurality of pieces of graphite paper which are alternately arranged; the two pieces of carbon fiber cloth are respectively arranged on the two sides of the aluminum oxide fiber-graphite composite layer; the carbon fiber cloth and the aluminum oxide fiber-graphite composite layer are stitched into a whole by a carbon fiber rope. The stitched laminar flexible heat insulation material is good in high temperature oxidation resistance and heat-insulating property, and all the layers have higher bonding strength.

Description

technical field [0001] The invention relates to the technical field of heat insulation materials, in particular to a seamed layered flexible heat insulation material and a preparation method thereof. Background technique [0002] With the development of aerospace technology, the operating temperature of aircraft engine hot-end components continues to increase, and the thermal protection of internal control circuits and metal components is particularly important. Ceramic fibers have the advantages of low density, high specific strength, oxidation resistance and high temperature resistance, and the use of such materials to prepare new insulation materials has increasingly become a research hotspot. Alumina fiber is a kind of high-performance ceramic fiber, the main component is Al 2 o 3 , exists in the form of short fiber, long fiber, whisker, etc., and has the characteristics of high modulus, high strength, high melting point, high temperature oxidation resistance and low t...

Claims

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Application Information

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IPC IPC(8): B32B9/04B32B7/08
CPCB32B5/02B32B5/06B32B7/12B32B9/00B32B9/007B32B2262/106
Inventor 孙现凯张峰张世超王广海孙浩然陈玉峰方凯李世新陈曙光
Owner CHINA BUILDING MATERIALS ACAD
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