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Polycrystalline alumina fiber blanket is a high-performance inorganic fiber insulation material with?alumina (Al?O?) as its core component. It is formed by interweaving alumina-based fibers into a blanket structure through special processes, and boasts advantages such as high temperature resistance, light weight, and strong thermal insulation. It is an indispensable key material in high-temperature industrial fields.
Technical Data
Property |
Test Method |
Specification |
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Chemical Composition |
Chemical Analysis |
72:28 |
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Mineral Structure |
XRD |
δ-Al?O?/γ-Al?O?/Mullite |
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Classification Temp |
GB/T 3003-2017 |
1600°C |
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Shot Content (≥45μm) |
GB/T 5480-2017 |
0-2% |
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LOI (Loss on Ignition) |
GB/T 32179-2015 |
0.001 |
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Specific Gravity |
GB/T 5071-2013 |
3.1 g/cm³ |
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Fiber Diameter |
GB/T 5480-2017 |
5.5-7.5 μm |
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Specific Heat Capacity |
GB/T 19466.4-2016 |
1.17-1.21 × 10³ J/kg·K |
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Heat Shrinkage (%) |
1400°C × 24h |
GB/T 17911 |
≤1% |
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1600°C × 24h |
≤1% |
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Thermal Conductivity |
600°C |
GB/T 17911 |
B.D.=100kg/m³ |
B.D.=130kg/m³ |
B.D.=150kg/m³ |
1000°C |
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1400°C |
Key Features
Ultra-High Temperature Resistance
Delivers consistent performance at 1000°C to 1600°C depending on alumina purity; short-term stability up to 1800°C, far surpassing the limits of conventional insulation materials like glass wool or rock wool.
Superior Thermal Insulation Performance
With fiber diameters of only a few microns and abundant internal closed pores, it achieves thermal conductivity as low as 0.03–0.1 W/(m·K) at room temperature—minimizing heat loss in high-temperature systems.
Outstanding Chemical Stability
Exhibits strong resistance to acid, alkali, oxidation, and high-temperature chemical reactions. Remains inert in aggressive environments, ensuring reliable performance over time.
High Mechanical Strength and Flexibility
The blanket structure enables easy cutting, folding, and installation, while maintaining strong impact resistance and resistance to cracking or breakage under mechanical stress.
Lightweight and Space-Saving
Provides high thermal efficiency without adding significant weight to equipment or structures—ideal for applications where weight and space constraints are critical.
Non-Toxic and Eco-Friendly
Completely inorganic, asbestos-free, and safe for long-term human and environmental exposure. An excellent choice for sustainable industrial insulation upgrades.
Applications
Metallurgical Industry
Used for lining blast furnaces, steel rolling reheat furnaces, and ladle insulation to minimize energy loss and improve furnace efficiency.
Ceramic and Glass Manufacturing
Acts as kiln insulation to maintain stable internal temperatures and reduce firing energy consumption, enhancing product quality and throughput.
Petrochemical and Power Plants
Insulates high-temperature pipelines, heat exchangers, and reactors, boosting thermal efficiency and protecting infrastructure from temperature-induced stress.
Aerospace and Defense
Serves as a critical thermal protection material in spacecraft, rocket engines, and re-entry systems, withstanding extreme temperature gradients during atmospheric transitions.