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Method for surface modification of alumina-based ceramic fiber

A fiber surface and base ceramic technology, which is used in the surface modification of alumina base ceramic fibers and the surface modification of inorganic ceramic fibers to achieve high mechanical properties, improve surface state, and improve fiber strength.

Active Publication Date: 2018-09-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of using in-situ chemical reaction to form inorganic nanoparticles to repair alumina-based ceramic fibers and modify its surface has not been reported, so the present invention is proposed

Method used

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  • Method for surface modification of alumina-based ceramic fiber
  • Method for surface modification of alumina-based ceramic fiber
  • Method for surface modification of alumina-based ceramic fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0063] A method for surface modification of alumina-based ceramic fibers, specifically implemented according to the following steps:

[0064] (1) Surface purification treatment of alumina-based ceramic fibers: immerse the fibers in deionized water, after ultrasonic treatment for 2 hours, place them in an oven for 1 hour at 110°C, and then take them out for use.

[0065] (2) Prepare the precursor solution: mix tetramethoxysilane and ethanol in a beaker, the tetramethoxysilane content is 60%, and stir evenly for 30 minutes.

[0066] (3) Prepare the reaction solution: mix methanol and deionized water at a mass ratio of 4:1, adjust the pH of the system to 5 with acetic acid, add 1% polyethylene glycol as a dispersant, and keep the temperature in a water bath at 30°C Keep warm and stir evenly for 60min.

[0067] (4) Precursor solution adhered to the fiber surface: immerse the alumina-based ceramic fiber treated in step (1) in the precursor solution in step (2) for 4 hours to fully...

Embodiment 2

[0071] A method for surface modification of alumina-based ceramic fibers, specifically implemented according to the following steps:

[0072] (1) Surface purification treatment of alumina-based ceramic fibers: immerse the fibers in a deionized water-ethanol mixed solution, after ultrasonic treatment for 2 hours, place them in an oven for 1 hour at 110°C, and then take them out for use.

[0073] (2) Prepare the precursor solution: mix tetraethoxysilane and propanol in a beaker, the tetraethoxysilane content is 70%, and stir evenly for 40 minutes.

[0074] (3) Prepare the reaction solution: mix acetone and deionized water at a mass ratio of 5:1, adjust the pH of the system to 4 with hydrochloric acid, add 2% dispersant ethylene glycol, and keep the temperature in a water bath at 40°C And stir evenly for 80min.

[0075](4) Precursor solution adhered to the fiber surface: immerse the alumina-based ceramic fiber treated in step (1) in the precursor solution in step (2) for 5 hours...

Embodiment 3

[0079] A method for surface modification of alumina-based ceramic fibers, specifically implemented according to the following steps:

[0080] (1) Surface purification treatment of alumina-based ceramic fibers: immerse the fibers in an acetone solution, after ultrasonic treatment for 2 hours, place them in an oven for 1 hour at 110°C, and then take them out for use.

[0081] (2) Prepare the precursor solution: mix tetrapropoxysilane and isopropanol in a beaker, the tetrapropoxysilane content is 80%, and stir evenly for 50 minutes.

[0082] (3) Configure the reaction solution: mix ethanol and deionized water at a mass ratio of 6:1, adjust the pH of the system to 6 with acetic acid, add 3% dispersant potassium chloride, and keep the temperature in a water bath at 50°C And stir evenly for 90min.

[0083] (4) Precursor solution adhered to the fiber surface: immerse the alumina-based ceramic fiber treated in step (1) in the precursor solution in step (2) for 6 hours to fully contac...

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Abstract

The invention relates to a method for surface modification of alumina-based ceramic fiber. The method comprises the steps of: adhering a precursor solution of SiO2 to the surface of the alumina-basedceramic fiber uniformly, and performing an in-situ chemical reaction on the surface of the fiber to form uniform SiO2 nano particles so as to complete the surface modification of the alumina-based ceramic fiber. By adopting the method to perform the surface modification of the alumina-based ceramic fiber, the strength of the fiber can be improved, and good mechanical properties of the alumina-based ceramic fiber can also be maintained at high temperature; meanwhile, surface micro cracks which can be formed during preparation of the alumina-based ceramic fiber can be repaired, and the surface state of the alumina-based ceramic continuous fiber can be improved; the method has a wide range of application, can be applied to alumina-based ceramic long fiber, alumina-based ceramic short fiber, fiber products of the alumina-based ceramic long fiber and alumina-based ceramic short fiber and the like, and is suitable for industrial production and easy to popularize.

Description

technical field [0001] The invention relates to a surface modification technology of inorganic ceramic fibers, in particular to a method for surface modification of alumina-based ceramic fibers, and belongs to the field of inorganic non-metallic materials. Background technique [0002] Alumina-based ceramic fiber is an important high-performance inorganic non-metallic material, which belongs to the category of ceramic fiber. It is based on Al 2 o 3 as the main component, while also adding SiO 2 , Fe 2 o 3 Wait. Alumina-based ceramic fibers have a series of advantages such as high strength, high temperature resistance, corrosion resistance, and weaving. They can be used as high-temperature and high-efficiency heat insulation materials, high-performance composite materials, and catalyst carriers. They are used in high-temperature industrial furnaces, new materials, chemical and Military industry, nuclear industry, aerospace and other fields. [0003] At present, the prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85C01B33/18B82Y40/00
CPCB82Y40/00C01B33/18C01P2004/03C01P2004/64C04B41/5035C04B41/85C04B41/4552C04B41/0072
Inventor 焦秀玲秦嘉贾玉娜陈代荣杨杰魏士龙
Owner SHANDONG UNIV
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