Flexible thermal barrier fibrous ceramic aerogel having core-sheath structure and method of making

CN122102710APending Publication Date: 2026-05-29HARBIN INST OF TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Filing Date
2026-03-27
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing aerogels lack versatility in multiple application scenarios, and it is difficult to balance flexibility and thermal insulation performance, which limits their application in high-temperature thermal protection and flexible deformation scenarios.

Method used

A flexible, heat-insulating fibrous ceramic aerogel with a core-sheath structure was prepared by combining Zr-Y-La nanofiber ceramic aerogel with nanoparticle ceramic aerogel, using electrospinning and sol-gel methods. The aerogel has a double-layer structure, with an inner nanofiber core and an outer nanoparticle sheath.

Benefits of technology

It achieves high flexibility (maximum resilient compressive deformation of 80%) and excellent thermal insulation performance (minimum thermal conductivity of 21.96mW/m·K), broadening the application range of aerogel materials and making them suitable for high-temperature thermal protection and flexible deformation scenarios.

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Abstract

The application discloses a kind of flexible heat-insulating fibrous ceramic aerogel with core-sheath structure and preparation method, belong to new material technical field.Preparation steps are: with Zr, Y, La preparation precursor, nanofiber ceramic aerogel core layer is prepared by electrostatic spinning and high temperature annealing;Again according to Zr, Y, La, Ti preparation nanoparticle precursor, after dispersing core layer, obtain initial gel by sol-gel;After ladder water bath aging, hydrophobic modification and solvent replacement, normal temperature and pressure drying and high temperature annealing again, obtain Zr-Y-La-Ti core-sheath structure fibrous ceramic aerogel.The inner layer of single fiber is nanofiber ceramic aerogel, and the outer layer is nanoparticle ceramic aerogel, closely adhere, and the surface is smooth.The aerogel has excellent flexibility and heat insulation performance, the minimum thermal conductivity is 21.96 mW / m·K, the maximum elastic compression deformation is 80%, the maximum working temperature is 1200 DEG C, and is suitable for high temperature heat protection and flexible deformation scene, which widens the application range of aerogel material.
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