Preparation method of zirconium boride ceramic fibre

A technology of ceramic fiber and zirconium boride, which is applied in the field of preparation of zirconium boride ceramics, can solve the problems of unsatisfactory performance, no ceramic fiber method, etc., and achieves the effects of low equipment requirements, low cost and broad application prospects.

Inactive Publication Date: 2012-07-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] ZrB 2 Although it has many superior characteristics, its current performance cannot meet the needs of practical applications. 2 The research mainly focuses on the preparation of raw material powder, the sintering densification process and the preparation of composite materials to improve its mechanical properties and high temperature oxidation resistance.
However, at present, there are few studies on ZrB at home and abroad. 2 Related reports on the preparation of ceramic fibers and their composite materials, Yuriy B.Paderno et al. (Y.B.Paderno et al.Journal of the European Ceramic Society, 2005,

Method used

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  • Preparation method of zirconium boride ceramic fibre
  • Preparation method of zirconium boride ceramic fibre
  • Preparation method of zirconium boride ceramic fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Will contain 8.646g ZrOCl 2 Add the aqueous solution containing 4.473g of borax drop by drop to the aqueous solution containing borax, fully stir until the mixture is uniform, then add the aqueous solution of sucrose containing 4.853g and the aqueous solution of citric acid containing 16.811g, mix uniformly, adjust the pH value of the system to 3, and react for 10h , to obtain a precursor solution; 17.146g of polyethylene oxide was dissolved in 60ml of 1:4 water-alcoholic solvent, mixed uniformly with the above-mentioned precursor solution at 50°C, concentrated until the viscosity reached 50Pa·s, and left standing for defoaming. Get ZrB 2 Precursor spinning solution for ceramic fibers. Spinning liquid at 60 ° C using solution spinning method to obtain ZrB 2 Ceramic fiber precursor, obtained after high temperature sintering ZrB 2 Ceramic fiber.

Embodiment 2

[0032] Will contain 15.645g Zr(NO 3 ) 4 The aqueous solution was added dropwise to the aqueous solution containing 3.647g of boric acid under stirring, fully stirred until uniformly mixed, and then added with a 1:1 water-alcohol solvent to dissolve 3.873g of thermosetting phenolic resin and the aqueous solution containing 12.232g of citric acid, Mix well, adjust the pH value of the solution to 3, react for 14h, dissolve 30.799g polyvinyl alcohol in 100ml 1:4 water-alcohol solvent, mix well with the above precursor solution at 60°C, concentrate until the viscosity reaches 50Pa· s, standing for defoaming, to get ZrB 2 Precursor spinning solution for ceramic fibers. The spinning solution was spun at 50°C to obtain ZrB by solution spinning 2 Ceramic fiber precursor, after a suitable calcination process, ZrB 2 Ceramic fiber.

Embodiment 3

[0034] Will contain 14.245g ZrOCl 2 ·8H 2 Add O aqueous solution dropwise to the stirring aqueous solution containing 7.436g of boric acid, stir well until mixed evenly, then add 2.643g sucrose aqueous solution and 15.811g acetic acid aqueous solution respectively, mix uniformly, adjust the pH value of the system to 2, and react for 11h , dissolve 20.998g hydroxypropyl cellulose in 80ml 1:4 water-alcohol solvent, mix well with the above precursor solution at 30°C, concentrate until the viscosity reaches 80Pa·s, stand for defoaming, and obtain ZrB 2 Precursor spinning solution for ceramic fibers. The spinning solution was spun at 70°C to obtain ZrB 2 Ceramic fiber precursor, after a suitable calcination process, ZrB 2 Ceramic fiber.

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Abstract

The invention relates to a preparation method of zirconium boride ceramic fibre, comprising the following steps of: (1) adding an aqueous solution containing a zirconium compound to an aqueous solution containing a boron compound, mixing evenly, dissolving a carbon source compound in the mixed solvent of ethanol and water, adding the mixed solvent of ethanol and water to the solution, adding an aqueous solution of complexing agents, mixing evenly, regulating pH value to be less than 4, and stirring for reaction for 10-16 hours to obtain a precursor solution; (2) mixing evenly a spinning addition agent and the precursor solution at the temperature between 30 and 70 DEG C and concentrating and defoaming the obtained mixture to obtain a precursor spinning solution of the zirconium boride ceramic fibre; (3) obtaining a precursor of the zirconium boride ceramic fibre from the spinning solution by a solvent spinning method at the temperature between 30 and 70 DEG C; and (4) obtaining the zirconium boride ceramic fibre by performing high temperature sintering on the precursor fibre. By adopting the method, ZrB2 ceramic nascent fiber with a better structure and performance can be obtained and the fiber with a promising prospect has the advantages of high temperature stability, low density, high heat conductivity and conductivity and the like.

Description

technical field [0001] The invention belongs to the field of preparation of zirconium boride ceramics, in particular to a preparation method of zirconium boride ceramic fibers. Background technique [0002] Modern aircraft (such as spacecraft, rockets, missiles, supersonic aircraft) are developing towards high speed, high altitude, high thrust and safer, which puts forward higher requirements for high-temperature materials: being able to adapt to supersonic long-term flight, Extreme environments such as atmospheric reentry, transatmospheric flight, and rocket propulsion systems must not only be able to withstand high temperatures (>2000°C), but also require anti-oxidation, anti-scouring, and thermal shock resistance, especially for aircraft nose cones, wing leading edges, Various critical parts or parts such as the hot end of the engine need to use ultra-high temperature materials. [0003] ZrB 2 As a member of ultra-high temperature ceramic materials (UHTCs), it has hi...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/622
Inventor 余木火孙泽玉韩克清彭雨晴牟世伟王征辉邓智华刘振全张婧
Owner DONGHUA UNIV
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