Polycrystalline Alumina Fiber Board For Extreme Heat Applications

Product Description：

Polycrystalline Alumina Fiber Board for Extreme Heat Applications is manufactured using a wet vacuum suction filtration and pressing molding process. It is produced from polycrystalline mullite bulk fibers combined with both organic and inorganic binders.

Polycrystalline Alumina Fiber Board for Extreme Heat Applications offers excellent mechanical strength, outstanding resistance to erosion and scouring, and is easy to machine and cut. The raw material-polycrystalline refractory fiber-is chemically stable, lightweight, and provides superior thermal insulation performance. As a widely used high-temperature insulation material, it can be applied directly on the hot face of furnace linings, effectively withstanding direct impact from high-temperature gas flows and flames.

 

Product Features:

Ultra-high temperature resistance: Long-term operating temperature up to 1600℃, with even higher short-term temperature resistance, suitable for ultra-high temperature conditions.

Low thermal conductivity and energy saving: The polycrystalline fiber microporous structure effectively inhibits heat conduction, resulting in low thermal conductivity, minimal heat loss, and significant energy savings.

High chemical purity: Al₂O₃ content ≥95%, extremely low impurity and slag content, no volatile matter precipitation at high temperatures, and no pollution to the furnace atmosphere.

Excellent thermal stability: Good thermal shock resistance, stable structure at high temperatures, and less prone to grain coarsening or phase transformation.

Good mechanical strength: High-temperature sintering, high compressive and flexural strength, not easily broken or slag-shedding, ensuring high reliability in installation and use.

High dimensional accuracy: Mold-formed, smooth surface, uniform thickness, easy to cut, drill, and process irregular shapes, and convenient installation.

Corrosion resistance: Except for hydrofluoric acid and strong alkalis, it has good resistance to most acid and alkali media and reducing atmospheres.

Low heat capacity: Low heat capacity, supports rapid heating and cooling, helping to improve production efficiency and process flexibility.

 

Product Applications:

Fine Ceramics & Electronics: Linings for ceramic sintering furnaces, pusher kilns, and roller kilns; semiconductor diffusion furnaces and heat treatment furnaces for electronic components; sintering equipment for precision ceramic devices such as MLCCs and LTCCs.

New Energy Batteries: Calcination furnaces for lithium-ion battery positive and negative electrode materials (such as lithium iron phosphate and ternary materials); high-temperature sintering equipment for solid electrolytes.

Metal Heat Treatment: Working linings and insulation layers for high-temperature vacuum furnaces, hydrogen furnaces, high-temperature alloy melting furnaces, and forging heating furnaces.

Petrochemicals: Back linings, insulation, and refractory linings for high-temperature reactors such as cracking furnaces, conversion furnaces, and gasification furnaces.

Aerospace & Military: High-temperature alloy precision casting, thermal insulation components for thermal protection systems, and insulation layers for rocket engine test benches.

Glass & Building Materials: Insulation linings for glass melting furnaces, special glass forming equipment, and sintering furnaces for ceramic fiber products.

Scientific Research & Experimentation: High-temperature experimental furnaces, material sintering and testing equipment, and ultra-high temperature thermal experimental devices.

 

Product Technical Parameters:

Item	Index
Classification Temperature (℃)	1600 (3000F)
Use limit (℃)	1450
Density(kg/m3)	260-600
Thermal Conductivity (w/m.k)	400 600 1000 1200	0.08 0.10 0.16 0.19
Linear shrinkage (%)	<2 (1450Cx24h)
Chemical Composition (%)	AL2O3 (%) SiO2 (%)	62 36
Modules of rupture (Mpa )	>0.3
Compressive strength(Mpa)	>0.25
Ignition loss(%)	8

 

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.

 

Customer visits

Packaging Display
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FAQ

Q1: What is your MOQ?

A1: We don't have a strict MOQ-orders of any size are welcome. Pricing is quantity-based.

Q2: What payment terms do you usually adopt?

A2: We typically require a 30%–50% T/T deposit upon order confirmation, with the balance paid before shipment once the goods are ready. Other payment methods such as L/C, Western Union (for small amounts), and PayPal are also available.

Q3: Can polycrystalline alumina fiber board be in direct contact with flames?

A3:Yes. Polycrystalline alumina fiber board exhibits excellent high-temperature stability and resistance to flame erosion. It can be used in direct contact with flames and applied on the hot face of high-temperature furnace linings to withstand the impact of flames and high-temperature gas flows. Its main crystalline phases are corundum and mullite, which provide outstanding high-temperature stability and erosion resistance.

Q4: Can polycrystalline alumina fiber board be used for energy-saving retrofits?

A4: Yes. Polycrystalline alumina fiber board features low heat storage and low thermal conductivity, which significantly improves equipment thermal efficiency and greatly reduces energy consumption. It has been successfully used as a substitute for imported products in multiple kilns, delivering excellent energy-saving performance while effectively lowering operating costs.

 

 

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