Ultra-High Temperature Polycrystalline Alumina Fiber Board

Product Description：

Ultra-High Temperature Polycrystalline Alumina Fiber Board is a high-performance insulation material manufactured from high-purity polycrystalline alumina fibers using a wet forming and high-temperature sintering process. Its internal structure consists of a uniformly interwoven fiber network, forming a dense body with a smooth surface. This unique structure combines the excellent thermal insulation of fibrous materials with the superior heat resistance of ceramics.

Ultra-High Temperature Polycrystalline Alumina Fiber Board offers outstanding high-temperature performance, with a continuous service temperature of up to 1450°C and even higher short-term resistance, significantly exceeding conventional aluminosilicate fibers. Its fine grain structure and high purity ensure exceptional stability, effectively preventing grain growth and phase transformation under extreme conditions.

With a microporous fiber structure, the material delivers extremely low thermal conductivity and heat storage, greatly reducing heat loss and improving energy efficiency compared to traditional refractory materials. This enables faster heating and cooling cycles, supporting high-efficiency industrial operations.

Composed mainly of α-alumina (≥95%), the product features very low impurity levels and minimal shot content, ensuring clean operation without contamination of the furnace atmosphere. It is especially suitable for high-purity applications such as electronic component sintering, advanced ceramics processing, and lithium-ion battery material calcination.

Mechanically, Ultra-High Temperature Polycrystalline Alumina Fiber Board combines fiber flexibility with good strength and thermal shock resistance. It resists cracking, spalling, and erosion during installation and operation. With precise dimensions and uniform thickness, it can be easily machined and customized for efficient installation.

Widely used in high-temperature furnaces-including ceramic kilns, semiconductor diffusion furnaces, vacuum furnaces, petrochemical units, and aerospace thermal systems-polycrystalline alumina fiberboard serves as both hot-face lining and backup insulation, making it an ideal energy-saving solution for ultra-high-temperature applications.

Product Features：

Ultra-high temperature resistance: Continuous use up to 1450℃ with excellent short-term tolerance

Low thermal conductivity: Microporous structure ensures superior insulation and energy savings

High purity: ≥95% Al₂O₃, low impurities, no contamination to furnace atmosphere

Excellent stability: مقاust to thermal shock with stable performance at high temperatures

Strong and durable: Good compressive and flexural strength, resistant to cracking and spalling

Easy processing: Precise dimensions, smooth surface, easy to cut and install

Corrosion resistance: Resistant to most acids, alkalis, and reducing atmospheres

Low heat capacity: Enables faster heating and cooling cycles

Product Applications：

Ceramics & Electronics: Kilns, diffusion furnaces, and precision ceramic sintering

New Energy: Lithium battery material calcination and solid electrolyte sintering

Metal Processing: Vacuum furnaces, alloy melting, and heat treatment

Petrochemical: Cracking, reforming, and gasification furnaces

Aerospace: Thermal protection systems and high-temperature insulation

Glass & Building Materials: Glass furnaces and ceramic production lines

R&D: High-temperature laboratory and testing equipment

Product Technical Parameters:

Product Certificate：

Why Choose Us

Extensive Experience

With 33 years of manufacturing expertise and 20 years of export experience in the ceramic fiber insulation industry, SUNTHERM is a trusted and professional manufacturer of thermal insulation materials.

Superior Quality

SUNTHERM products are produced under a strict manufacturing process and rigorous quality control system, ensuring consistent and reliable performance.

Tailored Solutions

SUNTHERM provides personalized and customized services based on your specific needs, offering optimal solutions for various application scenarios.

OEM Support

SUNTHERM offers comprehensive OEM services, helping you build your brand with confidence.

Fast & Reliable Delivery

Thanks to SUNTHERM large-scale and stable production capabilities, we ensure fast turnaround and on-time delivery for every order.

Competitive Pricing

Through years of dedication to international trade and supply chain optimization, we're able to offer the most competitive prices without compromising on quality.

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Packaging Display
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FAQ

Q1: What is your MOQ?

A1: We do not have a strict minimum order quantity. Orders of all sizes are welcome, and pricing is based on the order volume.

Q2: What payment terms do you usually offer?

A2: Our standard payment terms are a 30%–50% T/T deposit upon order confirmation, with the balance settled before shipment once the goods are ready. We also accept other payment methods such as L/C, Western Union (for small transactions), and PayPal.

Q3: Do you support customization?

A3: Yes, we provide OEM and customization services, supported by our in-house manufacturing capabilities and experienced technical team.

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