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Nextel® 312 Alumina/Silica/Boria Fiber (Al₂O₃ 62/SiO₂ 24/B₂O₃ 14)

Grade: Nextel® 312
Formula: Al₂O₃ 62/SiO₂ 24/B₂O₃ 14
Form: Fiber
Material: Alumina/Silica/Boria
Commodity: Ceramics
Nextel® 312 Alumina/Silica/Boria Fiber (Al₂O₃ 62/SiO₂ 24/B₂O₃ 14) is an advanced ceramic fiber offered as part of Goodfellow's extensive range of technical ceramics. With 31 variations available, this versatile material features a combination of high strength, temperature resistance and chemical stability. Typical applications for Nextel® 312 include high-temperature insulation, filtration components and reinforcement for composite materials. The unique properties of this fiber make it an ideal solution for demanding environments across industries like aerospace, energy and manufacturing.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Fiber
Filament Diameter ±25%
Number Of Yarns ±10%
Number Of Filaments ±10%
Tex Number ±10%
Length +5% / -1%

Material Properties for Ceramics

Chemical Resistance
Element Value
Acids - concentrated Fair
Acids - dilute Good
Alkalis Poor-Fair
Metals Good
Electrical Properties
Element Value
Dielectric constant 5.2@9.4GHz
Physical Properties
Element Value
Refractive index 1.57
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0
Density( gcm⁻³ ) 2.7
Thermal Properties
Element Value
Sublimation point( C ) 1800
Upper continuous use temperature( C ) 1200-1400
Specific heat( J K⁻¹ kg⁻¹ ) 1100@25°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 3@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 140
Tensile strength( MPa ) 1700

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