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Reaction Bonded Silicon Nitride/Si3N4 Rod

Formula: Si₃N₄
Form: Rod
Material: Reaction Bonded Silicon Nitride/Si3N4
Commodity: Ceramics
Reaction Bonded Silicon Nitride/Si3N4 Rods are part of our wide range of ceramic materials. They are made by nitriding compacted silicon powder, leaving a small amount of unreacted silicon to aid densification. These rods combine high strength, toughness and thermal shock resistance. These properties make them suitable for applications like mechanical seals, bearings, nozzles and crucibles operating at high temperatures. We offer 3 variations of Reaction Bonded Silicon Nitride/Si3N4 Rods to meet your specific requirements.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Rod
Diameter +20% / -10%

Material Properties for Ceramics

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

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