SUNTHERM Continuous Alumina Fiber

Product Description:

SUNTHERM Continuous Alumina Fiber is an advanced alumina-silica composite material produced through state-of-the-art sol-gel technology, specifically engineered to meet the rigorous demands of ultra-high-temperature applications. Built upon high-purity alumina and silica, and leveraging its unique microstructure, this fiber maintains long-term thermal stability and excellent mechanical performance at temperatures well above 1100°C.

SUNTHERM Continuous Alumina Fiber is widely utilized in cutting-edge sectors including aerospace, advanced equipment manufacturing, new energy, and national defense. It serves as an ideal solution for critical components such as rocket engine insulation layers, hypersonic vehicle structural parts, high-temperature furnace linings, and electromagnetic windows. The product not only represents a breakthrough in advanced materials technology but also provides reliable engineering assurance for high-temperature operational environments.

Based on alumina content, our product models are classified into three grades: AL17, AL18, and AL19.

 

Product Features:

Excellent High & Low Temperature Resistance

Excellent Acid & Alkali Resistance

Excellent Electrical Properties & Insulation

Excellent flexibility

High Designability

 

Product Applications:

Refractory insulation for hot-end components in aerospace

High-temperature filtration, high-temperature filter bags

Radar wave-transparent radome

Thermocouple wires, fire-resistant insulation for cables and wires

High-temperature furnace linings, thermal insulation sealing rings, high-temperature insulation curtains

High-temperature sintering gaskets

ACCOR composite core conductors

Oilstone abrasives

5G Communication field: Mobile phone backplate materials

Composite Materials: Reinforcement material for metal matrix, ceramic matrix, polymer matrix, etc.

 

Product Technical Parameters:

Property	AL17	AL18	AL19
Chemical Composition (wt.%)	72 Al₂O₃ + 28 SiO₂	85 Al₂O₃ + 15 SiO₂	≥99 Al₂O₃
Crystal Phase	γ-Al₂O₃ + Amorphous	α-Al₂O₃ + Mullite	α-Al₂O₃
Melting Point (°C)	1800	1800	2000
Continuous Use Temp. (°C)	≥1200	≥1300	≥1100
Monofilament Diameter	9–12	11–14	11–14
Density (g/cm³)	3.0	3.4	3.9
Tex (g/1000m)	67 / 200	100 / 167	100 / 167
Monofilament Tensile Strength (GPa)	≥2.0	≥2.0	≥3.0
Monofilament Tensile Modulus (GPa)	≥170	≥240	≥330
Dielectric Constant @9.5GHz	3.2	3.8	4.7
Loss Tangent @9.5GHz	0.005	0.005	0.007

 

AL17 Fiber: The fiber features a microcrystalline polycrystalline structure (γ-Al₂O₃ + Amorphous), with a diameter of 9-12μm. Its room-temperature tensile strength can exceed 2.0 GPa, and its long-term service temperature is above 1200°C. It exhibits excellent high-temperature resistance and creep resistance.

AL18 Fiber: The fiber is microcrystalline (α-Al₂O₃ + Mullite), with a diameter of 11-14μm. Its room-temperature tensile strength can exceed 2.0 GPa, and its long-term service temperature is above 1300°C. Currently, it is the alumina fiber with the best creep resistance. Its strength remains essentially unchanged below 1100°C, retains over 90% of room-temperature strength at 1200°C, and retains over 80% at 1300°C.

AL19 Fiber: The fiber is microcrystalline (α-Al₂O₃), with a diameter of 11-14μm. Its room-temperature tensile strength can exceed 3.0 GPa, and its long-term service temperature is above 1100°C. It offers high room-temperature strength and good mechanical properties, making it suitable as a composite reinforcement material, but it has poor high-temperature creep resistance.

 

Product Certificate

Customer Visits

Packaging Display

Related Products

FAQ

Q1: Are you a factory or a trading company?

A1: We are a factory. You are welcome to visit our facility anytime-I will personally guide you through our production lines.

 

Q2: Do you offer free samples?

A2: We do provide free samples; however, shipping fees are to be covered by the customer.

 

Q3: How do you ensure product quality control?

A3: SUNTHERM operates under a comprehensive quality management system that oversees every stage of production-from raw material composition to the final product's physical properties. All items undergo strict testing prior to shipment. We can also provide a quality inspection report along with the delivery upon request.

Hot Tags: suntherm continuous alumina fiber, China, suppliers, factory, customized, wholesale, price, free sample, 1600C Fiber Blanket, Ceramic Fiber Composite Module, Expanded Graphite Ceramic Fiber Paper, high temperature Ceramic fiber composite module, New Fiber Material, White Inorganic ceramic fiber board