Preparation process of multi-element composite alumina-based continuous fibers

A composite alumina and continuous fiber technology, which is applied in the field of continuous alumina-based fiber preparation technology, can solve the problems of inability to obtain continuous fibers, fiber morphology, short length of alumina fibers, etc., to improve mechanical properties, Good strength, lower sintering temperature effect

Active Publication Date: 2013-05-22
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, directly adding magnesium chloride to the precursor sol cannot obtain a smooth fiber morphology, which is caused by the accumulation of MgO on the fiber surface.
[0007] The results of the current research show that the length of the alumina fibers prepared so far is short and continuous fibers cannot be obtained

Method used

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  • Preparation process of multi-element composite alumina-based continuous fibers
  • Preparation process of multi-element composite alumina-based continuous fibers
  • Preparation process of multi-element composite alumina-based continuous fibers

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with specific examples.

[0022] Table 1 lists the formula composition in the first step process of 8 examples numbered 1-8. The types and amounts of aluminum powder, water, aluminum inorganic salts, grain inhibitors and sintering aids were determined according to different examples in Table 1.

[0023] Table 1. Recipe of raw materials

[0024]

[0025] Note: The addition amount of silica sol is calculated according to the content of silicon oxide in silica sol.

[0026] Table 2 lists the process conditions of the first, second and third steps of the embodiment in Table 1: the preparation conditions of the aluminum solution are determined according to the different embodiments in Table 2, and the aluminum solution is prepared. A high polymer spinning aid was added to the aluminum solution, and a spinnable alumina-based fiber precursor sol was prepared according to the concentration condi...

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Abstract

The invention discloses a preparation process of multi-element composite alumina-based continuous fibers. The preparation process comprises the following steps: adding an organic salt of aluminum to distilled water, adding metal aluminum powder, a grain inhibitor and a sintering aid after the aluminum salt is dissolved and subjecting the mixture to react at the temperature of 40-100 DEG C under the conditions of continuous stirring and condensation reflux to obtain the precursor aluminum solution; adding a high-polymer spinning aid to the precursor solution; concentrating the solution to obtain spinnable precursor sol; putting the concentrated sol in a liquid storage tank with a spinning bushing and carrying out spinning with a dry or wet method to obtain organism-containing protofilaments of alumina-based continuous fibers; and finally drying and sintering the protofilaments to obtain the alumina-based fibers. The alumina-based fibers obtained by the preparation process disclosed by the invention can be applied to the fields such as aviation, automobiles, cultural and sports supplies and the like, and are used as reinforcement in composite materials.

Description

technical field [0001] The invention relates to a preparation process for continuous alumina-based fibers that can be used as winding, lamination or other two-dimensional and three-dimensional weaving. Background technique [0002] Alumina-based fibers are generally polycrystalline ceramic fibers, with Al 2 o 3 as the main component, and contains SiO 2 , B 2 o 3 , ZrO 2 , Y 2 o 3 Or components such as MgO. Alumina-based fibers have high elastic modulus and high-temperature strength, creep resistance and thermal shock resistance, good stability and mechanical properties under high-temperature oxidation conditions, and low thermal conductivity and excellent electrical properties. Insulation, alumina-based fibers can be used in the fields of high-temperature materials and composite materials. [0003] In China, the production process of alumina-based short fibers is relatively mature (manufacturers include: Shandong Luyang, Zhejiang Deqing, Luoyang Refractories and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 杨建锋谭宏斌林光张海鸿丁亚平乔冠军鲍崇高
Owner XI AN JIAOTONG UNIV
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