Materials Today Chemistry· 2026Q1
Aluminum precursor engineering enables high-strength continuous mullite fibers
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- 2026year
Short summary
An aluminum precursor engineering strategy using a synergistic AIPO/AC ratio and optimized thermal treatment successfully produced high-strength, flexible continuous mullite fibers via dry spinning.
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Key points
- A novel aluminum precursor engineering strategy was developed for continuous mullite fiber production.
- Optimizing the AIP/AC ratio and thermal treatment improved precursor solution homogeneity and spinnability.
- The optimized fibers achieved a tensile strength of 1.3 GPa, elastic modulus of 57 GPa, and toughness of 12 MJ m−3.
- These fibers are suitable for aerospace, thermal insulation, and heat-resistant textile applications.
AI-generated from the title and abstract; the full text is not read.
Abstract
Continuous mullite fibers are attractive for aerospace and high-temperature applications owing to their low thermal conductivity, excellent thermal and chemical stability. However, the properties of mullite fibers are highly dependent on the chemistry and hydrolysis-polycondensation behavior of aluminum precursors. Herein, an aluminum precursor engineering strategy is proposed to improve the property of continuous mullite fibers. By synergistically regulating the aluminum isopropoxide/aluminum chloride hexahydrate (AIP/AC) ratio and optimizing thermal treatment, high-strength and flexible mullite fibers were successfully prepared via dry spinning. The optimized AIP/AC ratio promotes synchronized hydrolysis-polycondensation of aluminum and silicon precursors, significantly improving the homogeneity, stability and spinnability of the precursor solutions while suppressing structural defects in the fibers. At an AIP content of 80%, the fibers exhibit a tensile strength of 1.3 GPa, elastic modulus of 57 GPa, toughness of 12 MJ m −3 , and elongation at break of 2.2%. These mullite fibers show strong potential for thermal insulation, thermal protection, and heat-resistant textile applications.
The authors' abstract, as published at the source. Materials Today Chemistry, 2026 · DOI ↗
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Field: Ceramics and Composites
Ceramics and CompositesMaterials Science