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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  • 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 thei

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

Experimental program
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Example Embodiment

[0039] See figure 1 and figure 2 A method of preparing Si-Zr-O-C based ceramic fiber material, comprising the steps of:

[0040] Prepared spinning solution taken precursor sol: complexing agent to give a solution, then a solution of the silicon source, the spinning solution was mixed with additives to give a first precursor sol of zirconium source was dissolved in the spinning dope; the said spinning solution additives, auxiliaries solvents, catalysts, additives composed of a solute, said solute aid is any one or any mix of the following: polyvinyl pyrrolidone, polyvinyl alcohol, polyvinyl butyral, polyvinyl two alcohol, polyoxyethylene alcohol;

[0041] Precursor gel fibers Preparation: spinning liquid of the sol precursor electrostatic spinning to obtain a precursor gel fibers;

[0042]Ceramic fiber material acquisition: The above precursor gel fibers were sequentially dried, sintered to obtain the ceramic fiber material.

[0043] In the preparation of the precursor sol spun liq...

Example Embodiment

[0069] Example 1:

[0070] Precursor Sol Spinning Liquid: Weigh 1.91 g of a zirconate butyl icyster solution in a acetic acid solution of zirconate, continuously stirring to form a uniform solution, obtain a solution; place 0.25 g of PVP in a beaker, add 4.75 g of anhydrous ethanol and 0.5 g of 1 mol / L of dilute nitric acid, magnetic force for 1 hour, and ultrasonic 10 minute, so that PVP is well dispersed uniform, obtains a spinning auxiliary solution; add a solution and 0.74 g of VTMS to spinning In the auxiliary solution, stirring was stirred at room temperature for 30 minutes, resulting in sufficient hydrolysis and polycondensation of the zirconium source and silicon source to form a precursor sol spun liquid;

[0071] Preparation: Preparation of preparation precursor sol spun liquid into medical syringe, electrospinning technology, voltage is 20 kV, the injection rate is 1.5 ml / hr, the received distance is 15cm, spinning The ambient temperature is 30 ° C, the wet environm...

Example Embodiment

[0073] Example 2:

[0074] Precursor Sol Spinning Liquid: Weigh 1.91 g of a zirconate butyl icyster solution in a acetic acid solution of zirconate, continuously stirring to form a uniform solution, obtain a solution; place 0.25 g of PVP in a beaker, add 4.75 g of anhydrous ethanol and 0.5 g of 1 mol / L of dilute nitric acid, magnetic force for 1 hour, and ultrason for 10 minutes, which allows PVP to be well dispersed uniform, obtain a spinning auxiliary solution; add a solution and 1.48g VTMS to spinning In the auxiliary solution, stirring was stirred at room temperature for 30 minutes, resulting in sufficient hydrolysis and polycondensation of the zirconium source and silicon source to form a precursor sol spun liquid;

[0075] Preparation: Put the prepared precursor sol spun liquid into the medical syringe, using electrostatic spinning techniques, voltage is 20 kV, the injection rate is 1.5 ml / hr, the reception distance is 15cm, spinning The wire ambient temperature is 30 ° ...

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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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