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Double-layer high-temperature-resistant heat insulation and wave absorption composite material preparation method

A composite material, high temperature resistant technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of poor adhesion of wave absorbing coatings, high absorption efficiency, narrow absorption frequency band, etc., and achieve good environmental and temperature adaptability. , Good physical and mechanical properties, the effect of absorbing frequency bandwidth

Inactive Publication Date: 2017-06-09
闫博文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a double-layer high-temperature-resistant insulating The preparation method of thermal wave-absorbing composite material, the present invention first prepares ceramic fiber powder by aluminum trichloride, zirconium carbonate and other materials, then weighs nano-titanium dioxide, coupling agent, adds deionized water and mixes, then adds ceramic fiber powder, ultrasonically disperses Then heat and stir to obtain a slurry solution, mix the slurry solution and water glass, cast and sinter to obtain a base material, prepare a wave-absorbing coating using epoxy resin and coat it on the surface of the base, and after curing, a double-layer high-temperature-resistant insulating material can be obtained. Thermal wave-absorbing composite material, the base layer of the present invention is a ceramic fiber material with a porous structure, which not only has high resistivity, but also has low thermal conductivity and good high temperature resistance. After being combined with the outer layer coating, it can quickly absorb and attenuate electromagnetic waves, and the absorption efficiency High, wide bandwidth, light weight, excellent mechanical properties, the coating is firmly bonded to the base layer through the coupling agent, and it is not easy to fall off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Weigh 40g of aluminum trichloride, 1g of zirconium carbonate, 0.5g of yttrium acetate and 0.1g of lanthanum acetate into 150mL of deionized water, adjust the pH to 4 with 10% acetic acid solution by mass fraction, heat to 60°C after adjustment, and keep stirring After mixing for 20 minutes, add 1 g of triethyl phosphate, continue to stir for 20 minutes, and then distill under reduced pressure at 30 kPa for 30 minutes after stirring. Dry at ℃ for 8 hours, put the dried filamentous fibers into a tube furnace, raise the temperature to 700℃ under the protection of nitrogen atmosphere, heat treat for 2 hours, pulverize after heat treatment, and pass through 80 mesh sieve to obtain ceramic fiber powder; weigh 3g respectively Add nano-silica, 0.3g 3-glycidyl etheroxypropyl triethoxysilane and 0.3g dodecyl alcohol ester to 150g deionized water, stir and mix, add 10g of the above ceramic fiber powder, and ultrasonically disperse for 10min after adding , after dispersing, heat to...

example 2

[0021]Weigh 45g of aluminum trichloride, 2g of zirconium carbonate, 0.6g of yttrium acetate and 0.2g of lanthanum acetate into 175mL of deionized water, adjust the pH to 4.5 with 10% acetic acid solution by mass fraction, heat to 70°C after adjustment, and keep stirring After mixing for 25 minutes, add 2.5 g of triethyl phosphate, continue to stir for 25 minutes, and then distill under reduced pressure at 40 kPa for 40 minutes after stirring. After distillation, the concentrated solution is obtained, and the concentrated solution is spun, and the filamentous fibers are collected and placed in an oven. Dry at 110°C for 9 hours, put the dried filamentous fibers into a tube furnace, raise the temperature to 800°C under the protection of nitrogen atmosphere, heat treatment for 2.5 hours, pulverize after heat treatment, and pass through a 90-mesh sieve to obtain ceramic fiber powder; Take 4g of nano-silica, 0.4g of 3-glycidyl etheroxypropyl triethoxysilane and 0.4g of dodecyl alcoho...

example 3

[0024] Weigh 50g of aluminum trichloride, 3g of zirconium carbonate, 0.7g of yttrium acetate and 0.3g of lanthanum acetate into 200mL of deionized water, adjust the pH to 5 with 10% acetic acid solution by mass fraction, heat to 80°C after adjustment, and keep stirring After mixing for 30 minutes, add 4 g of triethyl phosphate, continue to stir for 30 minutes, and then distill under reduced pressure at 50 kPa for 50 minutes after stirring. After distillation, the concentrated solution is obtained, and the concentrated solution is spun, and the filamentous fibers are collected and placed in an oven. Dry at ℃ for 10 hours, put the dried filamentous fibers into a tube furnace, raise the temperature to 900℃ under the protection of nitrogen atmosphere, heat treat for 3 hours, pulverize after heat treatment, and pass through a 100-mesh sieve to obtain ceramic fiber powder; weigh 5g respectively Add nano-silica, 0.5g 3-glycidyl etheroxypropyl triethoxysilane and 0.5g dodecyl alcohol e...

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Abstract

The invention relates to a preparation method of a double-layer high-temperature-resistant heat-insulating wave-absorbing composite material, which belongs to the technical field of wave-absorbing material preparation. In the present invention, aluminum trichloride, zirconium carbonate and other materials are first prepared to obtain ceramic fiber powder, then nano-titanium dioxide and coupling agent are added to deionized water for mixing, then ceramic fiber powder is added, and after ultrasonic dispersion, heated and stirred to obtain a slurry solution, the The slurry solution and water glass are mixed, poured, molded and sintered to obtain a matrix material, and the wave-absorbing coating prepared by epoxy resin is coated on the surface of the matrix, and after curing, a double-layer high-temperature-resistant heat-insulating wave-absorbing composite material can be obtained. It is a ceramic fiber material with a porous structure, not only has high resistivity, but also has low thermal conductivity and good high temperature resistance. After being combined with the outer coating, it can quickly absorb and attenuate electromagnetic waves, with high absorption efficiency, wide frequency, light weight, Excellent mechanical properties, the coating is firmly combined with the base layer through the coupling agent, and it is not easy to fall off.

Description

technical field [0001] The invention relates to a preparation method of a double-layer high-temperature-resistant heat-insulating wave-absorbing composite material, which belongs to the technical field of wave-absorbing material preparation. Background technique [0002] With the development of modern high-tech, the problems of electromagnetic interference and electromagnetic compatibility caused by electromagnetic waves are becoming more and more serious. It not only causes interference and damage to electronic instruments and equipment, but also seriously restricts the international competitiveness of my country's electronic products and equipment, pollutes the environment, and endangers human health. , and the leakage of electromagnetic waves will also endanger national information security and military core secrets. Therefore, the development of electromagnetic absorbing materials to effectively attenuate the electromagnetic energy transmission between electronic equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/10C04B35/632C04B35/622C04B35/63C04B41/85C09K3/00
CPCC04B35/80C04B35/10C04B35/622C04B35/6316C04B35/632C04B41/009C04B41/5072C04B41/85C04B2235/3225C04B2235/3227C04B2235/3244C04B2235/3418C04B2235/3427C09K3/00
Inventor 闫博文葛明月
Owner 闫博文
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