Method for preparing continuous zirconium boride ceramic precursor fiber

A technology of ceramic precursors and ceramic fibers, which is applied in the field of preparation of high-temperature ceramic precursor fibers, can solve the problems of zirconium boride ceramic fibers that have not been reported, and achieve good spinnability

Inactive Publication Date: 2012-11-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on zirconium boride mainly focuses on powder and ceramics, and the r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add the prepared zirconium boride precursor solution (200.5g ZrOCl2 8H2O, 60.2g boric acid, 90.2g sucrose, 520.5g citric acid through proper reaction) into the reaction kettle, adjust the pH value to 4.5, add 0.9Kg poly Vinyl alcohol solution, and add 8.857g sodium dodecylbenzene sulfonate, mix evenly, concentrate, and vacuum degassing to obtain zirconium boride ceramic fiber precursor spinning solution; control the temperature of the spinning box to 55 ° C, spin Pressure 5MPa, spinneret hole diameter 0.2mm, aspect ratio 3:1, number of holes 300, set spinning tunnel temperature 130°C, tunnel 8m, winding speed 250m / min, continuous and uniform zirconium boride ceramic fibers can be obtained Precursor.

Embodiment 2

[0025] Add the prepared zirconium boride precursor solution (200.5g ZrOCl2 8H2O, 60.2g boric acid, 90.2g sucrose, 520.5g citric acid through proper reaction) into the reaction kettle, adjust the pH value to 4.5, add 0.9Kg poly Vinyl alcohol solution, and add 8.857g sodium dodecylbenzene sulfonate, mix evenly, concentrate, and vacuum degassing to obtain zirconium boride ceramic fiber precursor spinning solution; control the temperature of the spinning box to 55 ° C, spin Pressure 8MPa, spinneret hole diameter 0.2mm, aspect ratio 3:1, number of holes 300, set spinning tunnel temperature 150°C, tunnel 6m, winding speed 300m / min, can get uniform zirconium boride ceramic fiber precursor body.

Embodiment 3

[0027] Add the prepared zirconium boride precursor solution (200.5g ZrOCl2 8H2O, 60.2g boric acid, 90.2g sucrose, 520.5g citric acid through proper reaction) into the reaction kettle, adjust the pH value to 4.5, add 0.9Kg poly Vinyl alcohol solution, and 8.857g sodium dodecylbenzenesulfonate was added, mixed uniformly, concentrated, left to stand for degassing, to obtain zirconium boride ceramic fiber precursor spinning solution; control the temperature of the spinning box to 50 ° C, spin Wire pressure 10MPa. The spinneret hole diameter is 0.3mm, the length-to-diameter ratio is 4:1, the number of holes is 200, the temperature of the spinning tunnel is set at 150°C, the tunnel is 8m, and the winding speed is 380m / min. A uniform and good zirconium boride ceramic fiber precursor can be obtained.

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Abstract

The invention relates to a method for preparing a continuous zirconium boride ceramic precursor fiber. The method comprises the following steps: 1, adjusting the pH value of a prepared zirconium boride precursor solution to 4-5, mixing with an alcoholic solution of polyethylene, adding a surfactant, concentrating, and deaerating to obtain a zirconium boride ceramic fiber precursor spinning solution; and 2, carrying out continuous spinning by allowing the zirconium boride ceramic fiber precursor spinning solution to go through a metering pump, a spinning casing and a spinneret under 1-50MPa, and carrying out dry molding and reeling of spinning channels. The preparation method is simple, and the prepared spinning solution is uniform and has a good spinnability; and the continuous and uniform kilograme-level zirconium boride ceramic precursor fiber can be prepared through adopting a dry spinning device in the invention.

Description

technical field [0001] The invention belongs to the field of preparation of high-temperature ceramic precursor fibers, in particular to a method for preparing continuous zirconium boride ceramic precursor fibers. Background technique [0002] At present, many aspects, especially in the fields of national defense and aerospace, put forward high requirements on the properties of materials such as high strength, high temperature resistance, oxidation resistance, and wear resistance. In some key parts of aircraft, it is especially necessary to develop new high-performance materials. . High-performance ceramic fibers are widely used due to their excellent performance. [0003] Zirconium boride (ZrB 2 ) has the advantages of high hardness, modulus, thermal conductivity, etc., and at the same time low density, good thermal shock resistance, low resistance, melting point can reach above 3000 ° C, and the chemical bond is extremely strong, has good chemical stability, can meet A s...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/622
Inventor 余木火贾军孙泽玉韩克清邱显星唐彬彬胡建建张靖刘振全牟世伟
Owner DONGHUA UNIV
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