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The silicon nitride thermocouple protection tube is a specialized component designed to protect thermocouples in high-temperature and harsh environments. Silicon nitride (Si₃N₄) is a highly durable ceramic material known for its excellent thermal stability, high strength, and resistance to oxidation and thermal shock. These properties make it an ideal choice for protecting temperature sensors, such as thermocouples, in industrial applications.
TECH DATA OF GPS SIALON PRODUCTS:
Density | 3.20-3.26 | g/cm3 |
Apparent porosity | 0-0.2 | % |
Elastic modulus | 300-320 | GPa |
Compression strength | ＞1500 | MPa |
Vickers hardness (HV0.5) | 15-16 | GPa |
Fracture toughness | 7.0-9.0 | MPa.m½ |
Bending strength | 700-900 | MPa |
Poisson’s ratio | 0.25 | - |
Linear expansion coefficient | 3.1-3.3 | x10-6/℃ |
Weibull modulus | 11-13 | - |
Thermal conductivity | 20-25 | W/(m.k) |
Specific resistivity | 1014 | - |
KEY FEATURES OF SILICON NITRIDE THERMOCOUPLE PROTECTION TUBES:
1. High Thermal Resistance: Silicon nitride can withstand extremely high temperatures, often up to 1400°C, depending on the specific formulation.
2. Mechanical Strength: It offers superior mechanical strength even under thermal shock, reducing the risk of cracking or breaking in dynamic environments.
3. Corrosion Resistance: Silicon nitride is resistant to most corrosive environments, including acids and alkali, which is crucial in applications involving aggressive chemicals or molten metals.
4. Low Thermal Expansion: The material has a low coefficient of thermal expansion, reducing the chances of thermal stress cracking during rapid temperature changes.
5. Electrical Insulation: It provides excellent electrical insulation, which is important when using thermocouples in environments where electrical isolation is required.
6. Lightweight: Compared to metals or other ceramics, silicon nitride is relatively lightweight, making it easier to handle and install in various applications.
COMMON APPLICATIONS:
1. Metallurgy: Protection of thermocouples in furnaces or other high-temperature processes.
2. Ceramic Industries: Used in kilns and other firing environments.
3. Aerospace and Automotive: For measuring high temperatures in engines or exhaust systems.
4. Power Generation: Used in thermal power plants where high temperature sensors are essential.
Silicon nitride protection tubes are a reliable solution for safeguarding thermocouples in applications where both high temperature and mechanical stresses are present.
REGULAR SIZES:
OD(mm) | ID(mm) | L(mm) |
16 | 5 | 100-1000 |
22 | 12 | 100-1100 |
28 | 16 | 100-1500 |
