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Nano-porous thermal insulation ceramic coil and production method thereof

A technology of nanopores and coils, which is applied in the fields of composite materials, fire prevention, and heat insulation. It can solve the problems of high density, limited application range, and high thermal conductivity of ceramic materials at room temperature, and achieve high material activity, simple and effective methods, and high-temperature heat insulation performance. excellent effect

Active Publication Date: 2018-08-24
响水华夏特材科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The ceramic materials reported in the above patents have high density or high thermal conductivity at room temperature, and the finished products are hard materials, so the scope of application is limited

Method used

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  • Nano-porous thermal insulation ceramic coil and production method thereof
  • Nano-porous thermal insulation ceramic coil and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Spray the potassium hexatitanate whisker dilution solution with a concentration of 3% on the surface with a density of 130kg / m 3 The surface of the aluminum silicate fiber needle-punched felt was dried naturally for 10 minutes, and then used as a reinforcement material. According to the Si / Al molar ratio of 1:5, 1 volume of 1.0mol / L modified nano-silica sol was diluted with 4 volumes of ethanol to adjust the pH to 8, and 5 volumes of 1.0mol / L modified nano-silica sol Alumina sol was continuously mixed online, sprayed and impregnated into the reinforcing material coil, and after curing for 2 minutes, a wet material was obtained; after soaking the wet material in ethanol with pH~9 for 24 hours, supercritical drying was adopted at a drying temperature of 270 °C, maintain the pressure at 16MPa, release the pressure and discharge the medium in the material after 2-4h to obtain a dry material. After the dry material is heat-treated at 1000°C, the micro-nano ceramic heat-insu...

Embodiment 2

[0019] Spray the potassium hexatitanate whisker dilution solution with a concentration of 5% on the surface with a density of 130kg / m 3 The surface of the aluminum silicate fiber needle-punched felt was dried naturally for 10 minutes, and then used as a reinforcement material. According to the Si / Al molar ratio of 1:10, 1 volume of 1.0mol / L modified nano-silica sol was diluted with 9 volumes of ethanol to adjust the pH to 8, and 10 volumes of 1.0mol / L modified nano-silica sol Alumina sol was continuously mixed online, sprayed and impregnated into the reinforcing material coil, and after curing for 5 minutes, a wet material was obtained; the wet material was soaked in ethanol with pH~9 for 24 hours, and then supercritically dried at 260 °C °C, maintain the pressure at 14MPa, release the pressure and discharge the medium in the material after 2-4h to obtain a dry material, and after the dry material is heat-treated at 1000 °C, the micro-nano ceramic thermal insulation coil mater...

Embodiment 3

[0021] Spray the potassium hexatitanate whisker dilution solution with a concentration of 3% on the surface with a density of 130kg / m 3 The surface of the aluminum silicate fiber needle-punched felt was dried naturally for 10 minutes, and then used as a reinforcement material. Spray on the surface of aluminum silicate fiber needle-punched felt with a density of 130kg / m3, let it dry naturally for 10 minutes, and use it as a reinforcement material for later use. According to the Si / Al molar ratio of 1:5, 1 volume of 1.0mol / L modified nano-silica sol was diluted with 4 volumes of ethanol to adjust the pH to 8, and 5 volumes of 1.0mol / L modified nano-silica sol Alumina sol is continuously mixed online, sprayed and impregnated into the reinforcing material coil, and after 2 minutes of curing, a wet material is obtained; the wet material is soaked in ethanol with pH~9 for 24 hours, and then subcritically dried at 220 °C, maintain the pressure at 10MPa, and release the pressure afte...

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Abstract

The invention discloses a nano-porous thermal insulation ceramic coil and a production method thereof. The coil adopts a high temperature-resistant fiber felt as a reinforcing material, nano-porous mullite ceramic in situ formed by nano-silica and nano-alumina as a substrate and a high-temperature infrared shielding material as an auxiliary material, and the obtained nano-porous thermal insulationceramic coil has a good flexibility, a thermal conductivity at 25 DEG C of 0.015 W / (m.K) or less and a thermal conductivity at 1000 DEG C of 0.040 W / (m.K) or less. The coil can be cut at will, is convenient to construct, and can be widely used in the thermal insulation, energy saving and protection of supersonic aircrafts, military ships, metal melting, ceramic sintering and other high-temperature fields.

Description

technical field [0001] The invention relates to the fields of fire prevention, heat insulation and composite materials, in particular to a nanoporous ceramic heat insulation coil and a preparation method thereof. Background technique [0002] In order to achieve the purpose of heat preservation and energy saving for traditional industrial furnaces and other high-temperature equipment, an insulation layer is usually added outside the heavy insulation brick masonry or heavy amorphous insulation material construction. The heavy layer is very thick, and the kiln is bulky and heavy. For the batch furnace, the loss of heat storage is large. Although traditional refractory fibers such as aluminum silicate fiber and mullite fiber can meet the temperature resistance requirements for the insulation layer, it is difficult to meet the requirements of practical applications in terms of heat insulation effect in the high temperature section, resulting in huge heat loss and energy waste. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B35/80C04B35/81C04B35/622C04B38/00
CPCC04B35/803C04B35/185C04B35/622C04B38/0045C04B2235/5228C04B2235/5276C04B2235/616C04B2235/656C04B2235/77C04B2235/9607C04B2235/9615C04B38/0067
Inventor 段国栋陈世忠其他发明人请求不公开姓名
Owner 响水华夏特材科技发展有限公司
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