Preparation method of high-strength high-toughness zirconia nano-fiber

A nanofiber, tough zirconia technology, applied in the direction of inorganic raw material rayon, can solve the problems of limited application and low tensile strength, and achieve the effects of simple operation, low cost and simple process

Active Publication Date: 2019-04-05
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a ceramic material, zirconia fiber is a brittle material with low tensile strength, which greatly limits its application in aerospace and other fields.

Method used

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  • Preparation method of high-strength high-toughness zirconia nano-fiber
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  • Preparation method of high-strength high-toughness zirconia nano-fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation method of nanocrystalline reinforced amorphous zirconia nanofiber

[0029] In the first step, prepare an alcohol-water solution (water:ethanol=1:59) at room temperature, stir for 10-30min, and obtain 60-600mL of a colorless and transparent solution that is uniformly mixed;

[0030] In the second step, take 6-60 mL of the solution obtained in the first step, add 0.7 g of polyvinylpyrrolidone, and stir at room temperature for 10 minutes to obtain a uniform colorless and transparent solution;

[0031] In the third step, 10-100 mg of zirconium oxychloride octahydrate was added to the colorless and transparent solution obtained in the second step, and ultrasonically dispersed for 30 minutes to obtain a white suspension solution;

[0032] The fourth step is to keep the white suspension solution obtained in the third step at a constant temperature of 30°C and continue to stir for 2-6 hours. After the solution is cooled to room temperature, it is centrifuged and was...

Embodiment 2

[0036] Preparation method of amorphous zirconia nanofibers

[0037] In the first step, prepare an alcohol-water solution (water:ethanol=2:58) at room temperature, stir for 10-30min, and obtain 60-600mL of a colorless and transparent solution that is uniformly mixed;

[0038] In the second step, take 6-60 mL of the solution obtained in the first step, add 0.5-10 g of polyvinylpyrrolidone, and stir at room temperature for 10 minutes to obtain a uniform colorless and transparent solution;

[0039] In the third step, 10-100 mg of zirconium oxychloride octahydrate was added to the colorless and transparent solution obtained in the second step, and ultrasonically dispersed for 30 minutes to obtain a white suspension solution;

[0040] In the fourth step, keep the white suspension solution obtained in the third step at a constant temperature of 20°C and continue to stir for 2-6 hours. After the solution is cooled to room temperature, it is centrifuged and washed to obtain a white gel...

Embodiment 3

[0044] Preparation method of crystalline zirconia nanofibers

[0045] In the first step, prepare an alcohol-water solution (water:ethanol=3:57) at room temperature, stir for 10-30min, and obtain 60-600mL of a colorless and transparent solution that is uniformly mixed;

[0046] In the second step, take 6-60 mL of the solution obtained in the first step, add 0.5-10 g of polyvinylpyrrolidone, and stir at room temperature for 10 minutes to obtain a uniform colorless and transparent solution;

[0047] In the third step, 10-100 mg of zirconium oxychloride octahydrate was added to the colorless and transparent solution obtained in the second step, and ultrasonically dispersed for 30 minutes to obtain a white suspension solution;

[0048] The fourth step is to keep the white suspension solution obtained in the third step at a constant temperature of 40°C, and continue to stir for 2-6 hours. After the solution is cooled to room temperature, it is centrifuged and washed to obtain a whit...

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Abstract

The invention belongs to the technical field of light-weight high-strength nano-material preparation, and relates to a preparation method of a high-strength high-toughness zirconia nano-fiber material. According to the method, an ultrasonic-assisted liquid-phase reaction method is utilized, zirconium oxychloride octahydrate, polyvinylpyrrolidone and the like are adopted as raw materials, and the high-strength high-toughness zirconia nano-fiber material is prepared controllably. The method particularly comprises the steps that 1, an alcohol-water solution is prepared at room temperature, an appropriate amount of polyvinylpyrrolidone and zirconium oxychloride octahydrate are added, stirring is conducted to achieve uniform dispersion; 2, the mixed solution is subjected to ultrasonic treatmentfor 30 min, then constant temperature of 20-60 DEG C is kept, under the continuous stirring conduction, a reaction conducted for 2-6 hours, natural cooling and centrifugal washing are conducted, andfreeze-drying is conducted to obtain powder products; 3, powder products are placed in a muffle furnace, under the air atmosphere, calcining is conducted at 100-700 DEG C for 2 h, and finally a high-strength high-toughness zirconia nano-fiber material is obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of light-weight and high-strength nanometer materials, and relates to a preparation method of high-strength and high-toughness zirconia nanofibers. Background technique [0002] With the rapid development of the aerospace field, the requirements for new aerospace materials are getting higher and higher. The controllable preparation of lightweight, high-strength, high-toughness, and high-temperature-resistant materials, the establishment of related controllable assembly theories, and the realization of macro-fabrication processes have become key technologies for aerospace materials. Prepare materials that meet the needs of new spacecraft to break through relevant international blockades and technical barriers, and meet the major needs of national defense construction and national economy. [0003] At present, the focus of aerospace materials research is mainly reflected in the fields of metal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08
CPCD01F9/08
Inventor 郭林李逢时
Owner BEIHANG UNIV
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