Preparation method of alumina-based composite continuous fibers

Abstract

The invention discloses a preparation method of alumina-based composite continuous fibers. The preparation method comprises the following steps that 1) aluminium nitrate, zirconium nitrate, magnesium oxide and a carboxylic acid are added into water, wherein the number of carbon atoms of the carboxylic acid is in a range of 2 to 24; the mixture undergoes a reaction with stirring continuously at a certain temperature to from transparent carboxylate composite sol; 2) a certain amount of water is added into the carboxylate composite sol obtained from the step 1, and then a certain amount of a sintering additive and a certain amount of a polymer spinning additive are added into the carboxylate composite sol to produce alumina-based fiber precursor solution; 3) the alumina-based fiber precursor solution obtained from the step 2 is concentrated to form spinnable alumina-based fiber precursor sol; 4) the concentrated sol obtained from the step 3 is putted into a liquid storage tank with a spray-head and is processed through a wet spinning process or a dry spinning process to form alumina-based continuous precursor fibers containing organisms; and 5) the alumina-based continuous precursor fibers obtained from the step 4 are treated through processes of drying and sintering to from alumina-based composite fibers. The strength of the alumina-based composite continuous fibers is higher than the strength of single-phase alumina fibers. The alumina-based composite continuous fibers can be utilized for reinforcement of a composite material thereby improving the strength, the toughness and the heat-resistant performance of the composite material thus can be utilized widely for the fields of aerospace, automobiles and the like.

Description

technical field [0001] The invention relates to a preparation process of a continuous alumina-based composite fiber 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 manufa...

AI Technical Summary

Problems solved by technology

[0008] The current research results show that the length of the currently prepared alumina fibers is short, continuous fibers cannot be obtained, and the strength of the alumina fibers is low

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