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Process for preparing alumina-based continuous fiber with sol-gel method

A sol-gel method and continuous fiber technology, which is applied in the field of preparation technology of continuous alumina-based fibers, can solve the problem of high sintering temperature, and achieve the effects of improving strength and toughness, compact fiber section and improving heat resistance.

Inactive Publication Date: 2010-06-09
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • 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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  • Process for preparing alumina-based continuous fiber with sol-gel method
  • Process for preparing alumina-based continuous fiber with sol-gel method
  • Process for preparing alumina-based continuous fiber with sol-gel method

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with specific examples.

[0021] Table 1 has listed numbering as 16 embodiment first step processes of 1-16: determine the kind and the addition of aluminum nitrate, water, organic acid according to the different embodiments of table 1, and determine the preparation condition of aluminum carboxylate sol , to prepare aluminum carboxylate sol.

[0022] Table 1. Preparation of aluminum carboxylate sol

[0023]

[0024]

[0025] Table 2 has listed the second and third step process conditions of the embodiment of table 1: according to the different embodiments of table 2, add solvent, silicon-containing substance, spinning aid in the aluminum carboxylate sol, prepare according to the concentration conditions of table 2 Alumina-based fiber precursor sol. In the fourth step, the concentrated precursor sol is put into a liquid storage tank with a nozzle, and the alumina-based continuous fiber...

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Abstract

The invention discloses a process for preparing alumina-based continuous fiber with a sol-gel method. The process comprises the following steps of: adding aluminium nitrate and one or a plurality of kinds of carboxylic acids with the carbon number of 2 to 24 to distilled water; ensuring the mixture to react in the condition of continuous stirring under a certain temperature to obtain transparent carboxylate aluminium gel; adding a certain amount of solvent to the carboxylate aluminium gel, and adding a certain amount of silicon-contained additives and superpolymer spinning additives to obtain an alumina-based fiber precursor solution; concentrating the solution to obtain spinnable alumina-based fiber precursor sol; placing the concentrated sol to a liquid storage tank with a spray head, and spinning by adopting a dry method or a wet method to obtain alumina-based continuous fiber protofilament containing organic matters; and drying and sintering the protofilament to obtain the alumina-based continuous fiber. The alumina-based continuous fiber obtained by adopting the invention can be used for reinforcement of composite materials so as to further enhance the strength and toughness of the materials and improve the heat resistance of the materials, and is widely applied in the fields of aerospace, automobiles, 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李春芳金海云
Owner XI AN JIAOTONG UNIV
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