A kind of high-strength ceramic fiber thermal insulation material and preparation method thereof

A technology of ceramic fiber and heat insulating material, applied in the field of high-strength ceramic fiber heat insulating material and its preparation, can solve the problems of increasing the weight of the fiber heat insulating material, poor mechanical properties of the heat insulating material, affecting the heat insulating effect of the material, etc. The effect of high strength, short reaction time and low thermal conductivity

Active Publication Date: 2021-02-02
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual construction process, the mechanical properties of ceramic fiber insulation materials are poor, and they are very easy to break under the action of external forces, which increases the difficulty of construction, and the appearance of cracks will directly affect the insulation effect of the material.
[0003] In order to overcome the problem of poor mechanical properties of ceramic fiber materials, the current solution is to add a certain amount of adhesives, such as aluminum phosphate adhesives, chromium phosphate adhesives, and aluminum silicate adhesives, when preparing ceramic fiber materials. , aluminum sol, etc., but the addition of adhesives will increase the thermal conductivity of the material, and at the same time significantly increase the weight of the fiber insulation material, which is very unfavorable for the assembly of devices with load requirements

Method used

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  • A kind of high-strength ceramic fiber thermal insulation material and preparation method thereof
  • A kind of high-strength ceramic fiber thermal insulation material and preparation method thereof
  • A kind of high-strength ceramic fiber thermal insulation material and preparation method thereof

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preparation example Construction

[0024] The invention provides a method for preparing a high-strength ceramic fiber thermal insulation material, comprising the following steps:

[0025] 1) Weigh the ceramic fiber material, place it in the acetate solution (15% to 30% by weight) of the corresponding metal of the ceramic fiber material, and mix evenly. 25-65%; the ceramic fiber material is alumina fiber, zirconia fiber, aluminum silicate fiber or mullite fiber; the acetate solution is aluminum acetate solution or zirconium acetate solution, which is based on the selected ceramic The fiber material is selected to ensure the purity of the ceramic fiber material after processing.

[0026] 2) the mixed slurry 5 that step 1) obtains is packed in the metal splint mold 10, as figure 1 As shown, the metal splint mold 10 includes a first metal panel 1 and a second metal panel 2 arranged in parallel, and the first metal panel 1 and the second metal panel 2 are connected by a plurality of bolts 3 and nuts 4 that cooperat...

Embodiment 1

[0029] Take the alumina ceramic fiber material, put it into the aluminum acetate solution with a concentration of 15wt%, the amount of the aluminum acetate solution is 25% of the alumina fiber material, mix the two evenly, and pour the prepared mixed slurry into the metal splint mold , the pressure applied on the metal splint mold is 3MPa, put the metal splint mold with the mixed slurry in the oven, the oven is slowly heated to 150°C, and after the sample is kept for 12 hours, the oven is closed and the temperature is naturally cooled to room temperature , take out the sample from the metal splint mold and place it in an oven, continue drying at 100°C for 12 hours, take it out, and cool it naturally again to obtain a high-strength alumina ceramic fiber material. figure 2 It is a schematic diagram of the structure of the original alumina ceramic fiber material in this embodiment. The original alumina ceramic fiber material is simply intertwined at the fiber overlapping point, ...

Embodiment 2

[0031] Take the zirconia ceramic fiber material, put it into the zirconium acetate solution with a concentration of 20wt%, the amount of the zirconium acetate solution is 35% of the zirconia fiber material, mix the two evenly, pour the prepared mixed slurry into the metal splint mold , the pressure applied on the metal splint mold is 5MPa, put the metal splint mold with the mixed slurry in the oven, and the oven is slowly heated to 220°C, and after the sample is kept warm and pressured for 8 hours, the oven is closed and the temperature is naturally cooled to room temperature , Take out the sample in the metal splint mold and put it in an oven, continue drying at 120°C for 12 hours, take it out, and cool it naturally again to obtain a high-strength zirconia ceramic fiber material. figure 2 and image 3 It is a schematic structural diagram of the original zirconia ceramic fiber material and the treated zirconia ceramic fiber material in this embodiment, and the effect after fi...

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Abstract

The invention discloses a high-strength ceramic fiber heat insulating material and a preparation method thereof. The method comprises: placing the ceramic fiber in the acetate solution, mixing evenly, putting the mixed slurry into a metal splint mold, and applying pressure to the metal splint mold, and then keeping the pressure constant, putting the mixed slurry Put the metal splint in the oven, raise the temperature of the oven, keep the temperature and pressure for a period of time, then close the oven, wait for the oven to cool down to room temperature naturally, take out the sample in the mold and put it in the oven, after further drying and natural cooling, the described Ceramic fiber insulation. The invention has simple process, low preparation cost, short reaction time, low energy consumption and high production efficiency.

Description

technical field [0001] The invention belongs to the field of novel thermal insulation materials, and in particular relates to a high-strength ceramic fiber thermal insulation material and a preparation method thereof. Background technique [0002] Ceramic fiber insulation materials can be used in many high-temperature occasions due to their high temperature resistance and low thermal conductivity, such as engine components such as rockets, airplanes, and spacecraft, automotive engine components, heat exchanger components, etc., which can effectively block heat. The heat transfer from the surface of structural parts or ultra-high temperature parts to other parts. However, in the actual construction process, the mechanical properties of ceramic fiber insulation materials are poor, and they are easily broken under the action of external forces, which increases the difficulty of construction, and the appearance of cracks will directly affect the insulation effect of the material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02
CPCC04B30/02C04B2201/20C04B2201/32C04B2201/50C04B14/4625C04B24/04C04B14/4637C04B14/4656
Inventor 艾兵张世超孙现凯陈玉峰孙浩然陶柳实闫达琛方凯赵洋
Owner CHINA BUILDING MATERIALS ACAD
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