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Reaction Bonded Silicon Nitride Tube (Si₃N₄)

Available Configurations

Properties common to all products in this list

Grade: Reaction Bonded Composition: Si₃N₄ Form: Tube Material: Silicon Nitride Commodity: Ceramics Inside Diameter: 5mm
Reaction Bonded Silicon Nitride (Si₃N₄) Tube combines low density, high fracture toughness, and strong resistance to both wear and oxidation, making it a leading material for high-performance tubular components. Its stability in corrosive or high-temperature atmospheres ensures use in furnaces, molten metal handling, and advanced thermal systems. Industries such as aerospace, automotive, and chemical processing employ Si₃N₄ tubes in heat exchangers, thermocouple protection sheaths, and fluid transport systems exposed to harsh conditions. Research applications include high-temperature gas flow studies, thermal cycling tests, and evaluation of advanced ceramic-matrix composites. The tubular form maximizes surface-to-volume efficiency while providing robust thermal shock resistance. With superior reliability over metals, Si₃N₄ tubes play a crucial role in advancing energy, aerospace, and materials engineering technologies.
Starting at $1,520.00 each
No Minimum order Free technical support *Free delivery worldwide

Material Properties

Chemical Resistance
Element Value
Acids - concentrated Fair
Acids - dilute Good
Alkalis Fair
Halogens Good
Metals Fair
Electrical Properties
Element Value
Dielectric constant 10
Volume resistivity( Ohmcm ) >10⁷@25
Physical Properties
Element Value
Apparent porosity( % ) 15-23
Density( gcm⁻³ ) 2.4
Thermal Properties
Element Value
Upper continuous use temperature( C ) 1200-1500
Specific heat( J K⁻¹ kg⁻¹ ) 690@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 10-16@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 3.3@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 170-220
Hardness - Vickers( kgf mm⁻² ) 800-1000
Shear strength( MPa ) 190-240
Tensile strength( MPa ) 160
Pultrusions
Element Value
Compressive strength( MPa ) 550-650
each

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Available Configurations

Properties common to all products in this list

Grade: Reaction Bonded Composition: Si₃N₄ Form: Tube Material: Silicon Nitride Commodity: Ceramics Inside Diameter: 5mm

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Tolerances

Tube
Outside Diameter =<2mm ±10%
Outside Diameter =<5mm ±10%
Outside Diameter >5mm ±10%
Wall Thickness ±20%
Length <100mm ±1mm
Length >=100mm +5% / -1%