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Silicon Nitride Tubes

Silicon nitride tubes are ceramic thermocouple protection tubes used for melting aluminum. Silicon nitride tubes surpasses most metals high temperature capabilities and has a superior combination of creep and oxidation resistance. Additionally, its low thermal conductivity and high wear resistance make it an excellent material that can withstand the toughest of conditions in the most demanding industrial applications.

Product Features:

High hardness, high strength, wear resistance, corrosion resistance, high temperature resistance, good thermal diffusivity, good thermal shock resistance, low density.

Product Parameters:

Properties Units Value
Density, r g/cm3 3.31
Color dark gray
Water Absorption % @R.T. 0.0
Hardness Moh’s 9
Hardness knoop (kg/mm2) 2200
Compressive Strength MPa @ R.T. 689-2760
Tensile Strength MPa @ R.T. 360-434
Modulus of Elasticity
(Young’s Mod.)
GPa 317
Flexural Strength (MOR) MPa @ R.T. 679-896
Fracture Toughness, KIc MPa x m1/2 5.0-8.0
Max. Use Temperature
(* denotes inert atm.)
ºC 1500
Thermal Shock Resistance DT (ºC) 750
Thermal Conductivity W/m-K @ R.T. 27
Coefficient of Linear Thermal Expansion, al mm/m-ºC (~25ºC through ±1000ºC) 3.4
Specific Heat, cp cal/g-ºC @ R.T. 0.17
Dielectric Constant 1MHz @ R.T. 7.0
Dielectric Strength kV/mm 17.7
Electrical Resistivity Wcm @ R.T. 1013

Application and After-Sales Service:

Silicon nitride tubes is a commonly used ceramic material in the metallurgical industry.

Our silicon nitride tubes are exported to USA, Canada, Europe, and South America and Southeast Asia.

After-sales service:

Accept any repair of the product, help to improve technology for customer. And also provide long-term technical help and support for you.


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