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Technology of preparing aluminium oxide based continuous fibers by sol-gel process

A sol-gel method and continuous fiber technology, which is applied in the field of continuous alumina-based fiber preparation technology, can solve the problems of high sintering temperature, and achieve the effects of low preparation cost, stable physical and chemical properties, and good strength

Inactive Publication Date: 2010-06-02
XI AN JIAOTONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of these methods is that the sintering temperature is higher

Method used

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  • Technology of preparing aluminium oxide based continuous fibers by sol-gel process
  • Technology of preparing aluminium oxide based continuous fibers by sol-gel process
  • Technology of preparing aluminium oxide based continuous fibers by sol-gel process

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with specific examples.

[0020] Table 1 has listed numbering as 16 embodiment first step processes of 1-16: determine the kind and the addition of aluminum powder, dehydrated alcohol, polyhydric alcohol and catalyst according to the different embodiments of table 1, and determine the amount of aluminum alkoxide Preparation conditions, prepare aluminum alkoxide.

[0021] Table 1. Preparation of aluminum alkoxide solutions

[0022]

[0023]

[0024] Table 2 has listed the second and third step process conditions of the embodiment of table 1: add water (can not add, as embodiment 1), silicon-containing additive, spinning aid in the aluminum alkoxide solution according to the different embodiments of table 2 , according to the concentration conditions in the table to prepare the alumina-based fiber precursor sol.

[0025] Table 2. Preparation of alumina-based fiber precursor sol

[0026...

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Abstract

The invention discloses technology of preparing aluminium oxide based continuous fibers by a sol-gel process, which is characterized by adding one or more polyols containing 3-6 carbon atoms into anhydrous ethanol, adding aluminum powder and a catalyst after the mixture is evenly mixed and ensuring the mixture to react under the conditions of continuous stirring and reflux condensation under certain temperature to obtain transparent aluminum alkoxide solution; adding a given quantity of silicon-containing substances and spinning assistants into the aluminum alkoxide to obtain precursor solution of aluminium oxide based fibers and concentrating the solution to obtain precursor sol of spinnable aluminium oxide based fibers; placing the concentrated sol into a liquid storage tank with a spray nozzle and spinning by a dry or wet method to obtain aluminium oxide based continuous precursor fibers containing organics; and drying and sintering the precursor fibers to obtain the aluminium oxide based fibers. The aluminium oxide based continuous fibers prepared by the technology can be used in reinforcement in the composite, further improve the heat resistance and mechanical property of the material and are widely applied in the fields of aerospace, automobile and the like.

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 fiber is a kind of high performance inorganic fiber. It starts with Al 2 o 3 As the main component, it contains other metal oxide additives, such as SiO 2 and B 2 o 3 Wait. Alumina fiber has high strength, high modulus, excellent heat resistance and high temperature oxidation resistance. Compared with other fibers, it can maintain its excellent strength at higher temperatures. Alumina fiber has the form of long fiber, short fiber, whisker, etc., and can be made into various shapes such as cloth, belt, rope, etc., and is widely used in high-tech fields such as aerospace, aviation, automobile, and electric power. Alumina fiber has good surface activity and is easy to compound with metal and ceramics. It can be used to manufacture fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/624C04B35/10
Inventor 杨建锋谭宏斌林光丁亚平张亚彬金海云王红洁
Owner XI AN JIAOTONG UNIV
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