High-toughness nanocomposite ceramic and preparation method and application thereof
By processing polyimide fiber felt and modified waste ceramic powder, and by applying modifiers and modified alumina whiskers, high-toughness nanocomposite ceramics were prepared, which solved the shortcomings of existing ceramics in terms of refractoriness, flexural strength, fracture toughness, wear resistance, water resistance and corrosion resistance, and achieved a comprehensive improvement in material properties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHAOZHOU HUAZHONG CERAMIC IND CO LTD
- Filing Date
- 2026-05-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing high-toughness nanocomposite ceramics have shortcomings in terms of fire resistance, flexural strength, fracture toughness, wear resistance, water resistance, dimensional stability and corrosion resistance, especially in terms of interfacial bonding strength, matrix density and high-temperature stability, which need to be improved.
High-toughness nanocomposite ceramics were prepared by subjecting polyimide fiber felt to oxygen low-temperature plasma treatment and silane coupling agent KH550 vapor-phase grafting treatment, combined with impregnation and curing of a composite slurry containing modified waste ceramic powder and nano zinc oxide powder, followed by hot pressing curing and multiple aqueous Soxhlet extraction purification treatments. The modified waste ceramic powder was further modified by citric acid ultrasonic etching and silane coupling agent KH570 surface modification. Nano silica was prepared using a sol-gel method for surface modification, and modified alumina whiskers were treated with hydrogen peroxide hydroxylation to form strong mechanical interlocking interfaces and chemical bonds, thereby improving material properties.
It significantly improves the material's fire resistance, flexural strength, fracture toughness, wear resistance, water resistance, and corrosion resistance. By improving interfacial bonding, matrix density, and high-temperature stability, it fully realizes the toughening effect of fibers.
Smart Images
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