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

A technology of sol-gel method and continuous fiber, which is applied in the technical field of preparing alumina-based continuous fiber by sol-gel method, can solve the problems of high cost of aluminum alkoxide and achieve good toughness, stable physical and chemical properties, and dense fiber cross-section Effect

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

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Problems solved by technology

[0008] In order to overcome the disadvantage of high cost of aluminum alkoxide, the present invention provides a new process for preparing alumina-based continuous fiber based on sol-gel method

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

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

[0022] Table 1 has listed 16 embodiment step process conditions that are numbered 1-16: determine the kind and the addition of aluminum powder, water, organic acid and catalyst according to the different embodiments of table 1, and determine the preparation of aluminum sol condition, the aluminum carboxylate sol was prepared.

[0023] Table 1. Preparation of aluminum carboxylate sol

[0024]

[0025]

[0026] Note: the concentration of concentrated nitric acid in Table 1 is 60% (mass percentage), the concentration of concentrated hydrochloric acid is 36% (mass percentage), and the concentration of concentrated sulfuric acid is 98% (mass percentage).

[0027] Table 2 has listed the second and third step process conditions of the embodiment of table 1: add solvent, silicon-containing additive, high polymer spinning aid or lactic acid in aluminum carboxylate sol ...

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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 organic acid containing 1-8 carbon atoms into distilled water, 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 carboxylate solution; evaporating redundant organic acid in the aluminum carboxylate solution and then adding a solvent, a silicon-containing additive and a given quantity of spinning assistants to obtain precursor solution of aluminium oxide based fibers; concentrating the solution to obtain precursor sol of spinnable aluminium oxide based fibers; 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 strength, ductility and heat resistance of the material and are widely applied in the fields of aerospace, automobile and the like.

Description

technical field [0001] It 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 fiber-reinforce...

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李春芳乔冠军鲍崇高
Owner XI AN JIAOTONG UNIV
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