Method for preparing aluminum oxide ceramic fibers

A technology of ceramic fiber and alumina sol, which is applied in the direction of inorganic raw material artificial filament, etc., can solve the problems of poor flexibility, low strength, high porosity, etc., and achieve good high temperature resistance, good flexibility and high strength.

Active Publication Date: 2014-08-27
SHANDONG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Al prepared against prior art 2 o 3 Ceramic fibers have poor compactness, high porosity, low strength,

Method used

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  • Method for preparing aluminum oxide ceramic fibers
  • Method for preparing aluminum oxide ceramic fibers
  • Method for preparing aluminum oxide ceramic fibers

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Experimental program
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Embodiment Construction

[0007] Technical scheme of the present invention is as follows:

[0008] a kind of Al 2 o 3 The preparation method of ceramic fiber comprises steps as follows:

[0009] (1) Preparation of spinnable precursor sol

[0010] Silica sol was added to the Al 13 Colloidal alumina sol, so that Al 2 o 3 and SiO 2 The mass ratio is 1: (0.25-0.67), stirred and mixed evenly, and then aged in a water bath at 30-80°C to a viscosity of 10-160Pa·s to obtain a precursor sol; the Al in the alumina sol 13 The mass content of colloidal particles is 15-50%;

[0011] (2) Preparation of gel fibers by blowing into fibers

[0012] The precursor sol prepared in step (1) is blown into fibers to obtain gel fibers; process conditions: the inner diameter of the spinneret hole is 0.03-0.20mm, the pressure is 5-16MPa, the air temperature is 20-100°C, and the air flow rate is 5~80m / min;

[0013] (3) Gel fiber ceramicization

[0014] The gel fiber prepared in step (2) is ceramicized, and the process ...

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PUM

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Abstract

The invention discloses a method for preparing aluminum oxide ceramic fibers. Spinnable precursor sol is prepared by aluminum oxide solution containing Al 13 and silica sol, gel fibers are prepared through the blowing and spraying fiber forming technology, and the aluminum oxide ceramic fibers with the diameter of 1-7 mum are further obtained through heat treatment. A sol system prepared through the sol-gel method is stable, the content is controllable, and impurities are few. The ceramic fibers after heat treatment are good in flexibility, excellent in operability and free of slag balls. The method can be used in a reinforcing body in a composite material and improve the strength, heat resistance and the like of the material.

Description

technical field [0001] The invention relates to the preparation of alumina ceramic fibers and belongs to the field of inorganic non-metallic materials. Background technique [0002] Alumina ceramic fiber belongs to inorganic crystal fiber, the main component is aluminum oxide (Al 2 o 3 ), also contains a certain amount of additives, such as silicon dioxide (SiO 2 ), iron oxide (Fe 2 o 3 ), etc., it has many excellent properties, such as high strength, high temperature resistance, high melting point, strong corrosion resistance, good heat insulation performance, and small specific gravity, which can enhance the function of osteoblast bone replacement in medicine, and is also a kind of Engineering materials with relatively good comprehensive performance have very important applications in composite materials, industry and military fields. Al 2 o 3 As a thermal insulation material, ceramic fiber has good thermal insulation performance, which can significantly reduce heat...

Claims

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Application Information

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IPC IPC(8): D01F9/08C04B35/10C04B35/622
Inventor 陈代荣贾玉娜焦秀玲关芳柴鲁宁
Owner SHANDONG UNIV
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