Silicon nitride thermocouple protection tubes are man-made composite tubes. GORGEOUS CERAMICS (GGS) uses extremely high-purity silicon nitride (Si₃N₄) powder as raw material, manufactured through a mature precision molding and high-temperature sintering process.
Compared to alumina thermocouple protection tubes, silicon nitride protection tubes have stronger thermal shock resistance and are less prone to cracking under rapid heating and cooling conditions. Furthermore, their excellent corrosion resistance performs exceptionally well in environments containing molten metal, acidic or alkaline media, or complex atmospheres.
We can provide customized silicon nitride protection tube solutions for our clients. Whether in non-ferrous metal smelting, the steel industry, high-temperature furnaces, or the chemical industry, we can design optimal performance solutions.
Silicon nitride thermocouple protection tube parameters and specifications
|
Category |
Mülk |
Değer |
|
|
General |
Renk |
Light Grey |
|
|
Mekanik Özellikler |
Yoğunluk |
3.18 – 3.22 g/cm³ |
|
|
|
≥ 2900 MPa |
||
|
Eğilme Dayanımı |
750 – 850 MPa |
||
|
Weibull Modulus (m) |
14 – 16 |
||
|
Fracture Toughness (K₁c) |
6.0 – 6.8 MPa·m¹ᐟ² |
||
|
Young’s Modulus (E) |
300 – 320 GPa |
||
|
Poisson Oranı |
0.27 – 0.29 |
||
|
Vickers Hardness (HV1) |
15 – 17 GPa |
||
|
Termal Özellikler |
Max. Operating Temperature (Inert Atmosphere) |
up to 1250°C |
|
|
Max. Operating Temperature (Air) |
1050 – 1100°C |
||
|
Isıl İletkenlik @ 25°C |
25 – 30 W/m·K |
||
|
Thermal Conductivity @ 1000°C |
15 – 18 W/m·K |
||
|
Coefficient of Thermal Expansion (20–100°C) |
(2.0 – 2.5) ×10⁻⁶ /K |
||
|
Coefficient of Thermal Expansion (20–1000°C) |
(3.2 – 3.6) ×10⁻⁶ /K |
||
|
Thermal Shock Resistance (ΔT) |
550 – 650 K |
||
|
Thermal Shock Parameter (R2) |
13 – 16 W/mm |
||
|
Elektriksel Özellikler |
Electrical Resistivity @ 20°C |
≥ 10¹² Ω·cm |
|
|
Electrical Resistivity @ 800°C |
10⁶ – 10⁷ Ω·cm |
||
|
Dielektrik sabiti |
5.5 – 6.5 (MHz) |
Disclaimer: The data above are typical properties of silicon nitride ceramic materials and are for your reference only. Actual product properties may vary due to specific purity, processing, and testing conditions.
Applications of silicon nitride thermocouple protection tubes
The main purpose of silicon nitride thermocouple protection tubes is to ensure accurate temperature measurement and extend sensor life. Their main practical applications are as follows: temperature measurement of non-ferrous metal melts, resistance to aluminum melt corrosion, temperature measurement in high-temperature furnaces, temperature measurement in acid and alkaline atmospheres, temperature monitoring in corrosive gas furnaces, heat treatment furnaces, sintering furnaces, powder conveying systems, and high-velocity gas/particle environments.
SSS
1.Why choose silicon nitride thermocouple protection tubes instead of other materials?
Silicon nitride protective tubes have stronger thermal shock resistance and mechanical strength. Compared with aluminum oxide, they have stronger resistance to corrosion of molten metals such as molten aluminum, are less prone to slag adhesion, and have a longer service life.
2.What temperature ranges can silicon nitride thermocouple protection tubes be used in?
Silicon nitride protective tubes can be used stably for a long time in high-temperature environments above 1000°C.
3.Are silicon nitride protective tubes suitable for measuring the temperature of molten aluminum?
Ideally suited for measuring the temperature of molten aluminum. The silicon nitride protective tube does not react with aluminum and is less prone to aluminum dross adhesion, ensuring accurate temperature measurement and extending its service life.
