In the field of ultra-high temperature insulation materials, the performance limitations of conventional aluminosilicate fibers have become increasingly prominent. Featuring high alumina purity of 71–73%, outstanding long-term service temperature up to 1400°C, and fully self-developed advanced technologies, Aladdin Polycrystalline Alumina Fiber Needled Blanket is emerging as a key product advancing the localization of high-end thermal protection materials.
Polycrstalline Alumina Fiber Needled Blanket is manufactured from high-purity polycrystalline alumina fibers. The fibers are produced via the sol-gel chemical route, formed by spinning or blowing, and calcined at high temperatures. The blanket is then fabricated through an enhanced double-sided needling process. It contains 71–73% alumina and features a stable microcrystalline internal structure. This fundamental structural difference delivers comprehensive advantages in maximum service temperature and service life.
The performance strengths of Polycrystalline Alumina Fiber Needled Blanket are reflected in five aspects:
Excellent Temperature ResistanceConventional aluminosilicate fibers have a long-term service temperature of approximately 1050–1450°C. In contrast, polycrystalline alumina fibers sustain stable long-term operation at 1400–1500°C, far exceeding traditional glassy fibers and performing reliably under extreme working conditions.
Ultra-low Thermal ConductivityThanks to the dense fiber network and microcrystalline structure, the material achieves extremely low thermal conductivity and effectively blocks heat transfer. Its thermal conductivity reaches as low as 0.26 W/(m·K) at 1200°C, delivering superior insulation performance compared with similar products.
Outstanding Mechanical StrengthThe enhanced double-sided needling process greatly improves fiber interweaving. The blanket maintains good flexibility while possessing excellent tensile strength and delamination resistance. Free of shot content, it offers convenient construction.
Low Permanent Linear Shrinkage at High TemperatureThe material exhibits low linear shrinkage under sustained high-temperature exposure, resisting shrinkage and deformation during long-term service, ensuring long-term reliability and tightness of furnace lining structures.
Binder-free CompositionThe product consists solely of high-performance alumina fibers without organic binders, eliminating risks of organic volatilization and material contamination at high temperatures.
Industrial Furnaces: Furnace lining materials for ultra-high temperature electric furnaces, target sintering furnaces, special ceramic sintering furnaces and sapphire annealing furnaces; delivers excellent performance in high-temperature furnaces under inert atmosphere.
Automotive Exhaust Aftertreatment: Used for gaskets in three-way catalytic converters and diesel particulate filters (DPF). Under transient peak temperature of 1600°C during DPF regeneration, the breakage rate of ceramic substrates drops from 12% to 0.5%, and the maintenance interval extends from 500 hours to 8000 hours.
Aerospace & Military Industry: High-temperature thermal insulation and thermal protection systems for rocket engines.
New Energy Vehicles & Semiconductors: Thermal runaway protection for battery packs and high-temperature insulation gaskets for semiconductor equipment.
Polycrstalline Alumina Fiber Needled Blanket holds distinct competitive advantages in the ultra-high temperature insulation sector. It serves an irreplaceable function across aerospace, high-end manufacturing, automotive exhaust aftertreatment, new energy equipment and other industries. With independently controllable technical systems, Aladdin fills a critical gap in domestic high-end high-temperature materials. For further inquiries, please contact Jiangsu Aladdin High Temperature Materials Co., Ltd. Tel: 400-085-8836 E-mail: aladdin@aldfiber.com
Aladdin High Temperature Materials Co., Ltd. has over 40 years of development experience as a professional ceramic fiber manufacturer integrating production, R&D and engineering development. We operate four major production bases nationwide located in Hebei, Shandong, Shanxi and Jiangsu, with more than 30 production lines and an annual output exceeding 200,000 tons.
All Aladdin ceramic fiber products are supplied with corresponding test reports and comply with Chinese national standards. If you are interested in our products, please send us a message or type “Purchase” to obtain our contact information.
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