Polycrystalline Alumina Fiber For Extreme High-Temperature Insulation

Product Description：

Polycrystalline Alumina Fiber for Extreme High-Temperature Insulation 95-N is a premium‑grade insulation solution developed specifically for rigorous industrial thermal management. Manufactured using a state‑of‑the‑art sol‑gel technology, it is predominantly composed of high‑purity alumina (Al₂O₃) with a balanced silica (SiO₂) content.

As an advanced ultra‑lightweight refractory material, ALWOOL 95-N stands out with its bright white appearance, supple hand feel, and durable resilience. It sustains operational temperatures significantly higher than those of conventional ALWOOL 72-M polycrystalline alumina fiber, making it a reliable choice for elevated‑heat environments. Beyond its fiber form, this material can be efficiently processed into rigid boards, precision‑engineered shaped parts, and other custom configurations to meet specific design requirements.

Widely adopted in high-temperature insulation linings, kiln furniture, and aerospace thermal protection systems, ALWOOL 95-N offers exceptional thermal stability, low thermal conductivity, and long service life under extreme conditions. Its versatility and performance make it an essential material for engineers and manufacturers seeking robust, energy‑efficient solutions in advanced thermal applications.

 

Product Features:

Excellent high and low-temperature resistance, with an operating range of 1400°C to 1800°C;

Superior resistance to acids and alkalis;

Fiber is free of shot balls (≥45μm); lower shot content results in better thermal insulation and refractory performance;

Excellent electrical insulation properties;

High design flexibility; products with varying properties can be obtained by adjusting chemical composition and heat treatment processes.

 

Product Applications:

Aerospace thermal protection systems

High-temperature furnace linings / insulation panels

Rocket engine insulation layers

Lining for molten metal transfer ladles

Insulation cylinders for photovoltaic crystal growth furnaces

 

Product Technical Parameters:

Item	AL72-F	AL72-M	AL95-M	AL95-N
Chemical Composition Al₂O₃, SiO₂ (%)	72-75:25-28	72-75:25-28	>95:<5	>95:<5
Mineral Structure	δ-Al₂O₃,γ-Al₂O₃	Mullite	γ-Al₂O₃	α-Al₂O₃
Classification Temperature (°C)	1600	1600	1600	1800
Melting Point (°C)	>1800	>1800	>2000	>2000
Density (g/cm³)	3.1	3.1	2.8	3.4
Average Fiber Diameter (μm)	5.5-7.5	5.5-7.5	3-5	3-5
Shot Content (%) (≥45μm)	0-2	0-2	0-2	0-2
Impurity Content (%)	<0.5	<0.5	<0.5	<0.5
Monofilament Tensile Strength (MPa)	≥1200	≥1000	-	-
Monofilament Tensile Modulus (GPa)	≥100	≥100	-	-

 

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
SUNTHERM has a professional team with rich experience in customizing packaging for various products.

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FAQ

Q1: What is your Minimum Order Quantity (MOQ)?

A1: We offer flexible MOQ options to suit a wide range of customer requirements. Rather than a fixed minimum, our MOQ varies by product type. We also provide tiered pricing that becomes increasingly competitive with larger volumes, ensuring cost-effectiveness for both trial orders and bulk purchases.

Q2: What are your standard payment terms?

A2: Our standard payment structure requires a 30–50% deposit via T/T upon order confirmation, with the remaining balance due before shipment after production is completed. We also accommodate other payment methods, including L/C, PayPal (for smaller transactions), and Western Union, depending on your preference.

Q3: Do you offer customization or OEM services?

A3: Yes, absolutely. Leveraging our in-house manufacturing facility and experienced R&D team, we specialize in both OEM and ODM projects. We can tailor products to your exact specifications-including dimensions, technical performance, and packaging or branding requirements.

Q4: What is your typical production lead time?

A4: Production timelines depend on product complexity and order size. Generally, lead times range from 7 to 15 working days after order confirmation and deposit receipt. We will provide a confirmed delivery schedule once all project details are finalized.

Q5: Do you provide samples? What is your sample policy?

A5: Yes, samples are available for quality assessment. Sample fees and shipping costs are typically paid upfront; however, we are happy to deduct or fully refund these charges upon placement of a formal bulk order.

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