Preparation method of Si-Zr-O-C-based ceramic fiber material, product and application

A ceramic fiber and product technology, applied in the field of ceramic fiber material preparation technology, can solve the problems of heat insulation performance and mechanical performance reduction, and achieve the effects of reducing thermal conductivity, enhancing infrared shielding effect, and increasing barrier effect

Pending Publication Date: 2022-01-07
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These ceramic fibers have good thermal insulation or mechanical properties at room temperature, but their thermal insulation and mechanical properties will be greatly reduced in high temperature environments.

Method used

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  • Preparation method of Si-Zr-O-C-based ceramic fiber material, product and application
  • Preparation method of Si-Zr-O-C-based ceramic fiber material, product and application

Examples

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preparation example Construction

[0039] see figure 1 and figure 2 , a preparation method of Si-Zr-O-C based ceramic fiber material, comprising the following steps:

[0040] Preparation of precursor sol spinning solution: first dissolve the zirconium source in a complexing agent to obtain a primary solution, then mix the primary solution, silicon source, and spinning aid solution to obtain a precursor sol spinning solution; Said spinning aid solution is made of auxiliary solute, auxiliary solvent, catalyst, and said auxiliary solute is any one of the following or mixed arbitrarily: polyvinylpyrrolidone, polyvinyl alcohol, polyvinyl butyral, polyethylene diacetal Alcohol, polyoxyalkylene alcohol;

[0041] Preparation of precursor gel fibers: electrospinning the above precursor sol spinning solution to obtain precursor gel fibers;

[0042]Obtaining the ceramic fiber material: drying and sintering the above-mentioned precursor gel fiber in order to obtain the ceramic fiber material.

[0043] In the preparati...

Embodiment 1

[0070] Preparation of precursor sol spinning solution: Weigh 1.91g of butyl zirconate and dissolve it in 0.6g of acetic acid solution, stir continuously to form a uniform solution, and obtain a primary solution; place 0.25g of PVP in a beaker, add 4.75g of absolute ethanol and 0.5g of 1mol / L dilute nitric acid, magnetic stirring for 1 hour, and ultrasonication for 10 minutes to make the PVP fully dispersed evenly, to obtain a spinning aid solution; add the primary solution and 0.74g VTMS to the spinning In the auxiliary agent solution, stir at room temperature for 30 minutes, so that the zirconium source and the silicon source are fully hydrolyzed and polycondensed to form a precursor sol spinning solution;

[0071] Preparation of precursor gel fiber: put the prepared precursor sol spinning solution into a medical syringe, use electrospinning technology, the voltage is 20kV, the injection rate is 1.5mL / hr, the receiving distance is 15cm, and the spinning The ambient temperatur...

Embodiment 2

[0074] Preparation of precursor sol spinning solution: Weigh 1.91g of butyl zirconate and dissolve it in 0.6g of acetic acid solution, stir continuously to form a uniform solution, and obtain a primary solution; place 0.25g of PVP in a beaker, add 4.75g of absolute ethanol and 0.5g of 1mol / L dilute nitric acid, magnetic stirring for 1 hour, and ultrasonication for 10 minutes to make the PVP fully dispersed evenly, to obtain a spinning aid solution; add the primary solution and 1.48g VTMS to the spinning In the auxiliary agent solution, stir at room temperature for 30 minutes, so that the zirconium source and the silicon source are fully hydrolyzed and polycondensed to form a precursor sol spinning solution;

[0075] Preparation of precursor gel fiber: The prepared precursor sol spinning solution was filled into a medical syringe, and the electrospinning technology was used with a voltage of 20 kV, an injection rate of 1.5 mL / hr, and a receiving distance of 15 cm. The temperatu...

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Abstract

A preparation method of a Si-Zr-O-C-based ceramic fiber material comprises the following steps of: dissolving a zirconium source in a complexing agent to obtain a primary solution; mixing the primary solution, a silicon source and a spinning auxiliary solution to obtain a precursor sol spinning solution; carrying out electrostatic spinning on the precursor sol spinning solution to obtain precursor gel fibers; and sequentially drying and sintering the precursor gel fibers to obtain a final product, namely the ceramic fiber material. The ceramic fiber material can be applied to the field of heat insulation. According to the design, good heat insulation performance and mechanical performance can be both achieved in a high-temperature using environment, the production cost is low, the fiber continuity is good, and the energy consumption is low.

Description

technical field [0001] The invention relates to a preparation process of a ceramic fiber material, which belongs to the technical field of heat insulation, in particular to a preparation method, product and application of a Si-Zr-O-C based ceramic fiber material. Background technique [0002] Ceramic fiber is a material with low density, high strength, good thermal stability at high temperature, ablation resistance and good toughness. Therefore, flexible ceramic fiber can be used as a heat insulation material alone or as a reinforcement in composite materials. Therefore, ceramic fiber materials have great application prospects in the field of high temperature insulation, such as the thermal protection system of aerospace vehicles. [0003] Common ceramic fiber materials mainly include oxides and non-oxides. Among them, oxide ceramic fibers mainly include Al2O3, SiO2, ZrO2, etc., and non-oxide ceramic fibers mainly include SiC, Si3N4, etc. These ceramic fibers have good ther...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/622D01F1/10D01F9/10
CPCC04B35/56C04B35/62272D01F9/10D01F1/10C04B2235/3244C04B2235/3826C04B2235/96C04B2235/9607
Inventor 李娜钟佳锦包海峰秦艳敏方正
Owner WUHAN TEXTILE UNIV
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