Introduction of Silicon Nitride Thermocouples
A silicon nitride thermocouple is a temperature sensor made from silicon nitride (Si₃N₄) material and is mainly used for temperature measurement in high temperature environments. Silicon nitride is an ideal material for manufacturing thermocouples because of its excellent high-temperature stability, chemical inertness, and mechanical strength, and is especially suitable for extreme conditions.
Silicon Nitride Thermocouples
Features of Silicon Nitride Thermocouples
High-temperature stability: Silicon nitride can remain stable in environments up to 1400°C, making it suitable for high-temperature measurements.
Chemical inertness: Silicon nitride shows good corrosion resistance to a wide range of chemicals and is suitable for corrosive environments.
Mechanical Strength: Silicon Nitride has high hardness and resistance to abrasion, maintaining structural integrity under harsh conditions.
Thermal shock resistance: Silicon nitride can withstand rapid temperature changes without rupturing easily.
Electrical insulation: Silicon Nitride is a good electrical insulator, suitable for application scenarios requiring electrical insulation.
Specifications of Silicon Nitride Thermocouples
|
Property |
Specification |
|
Material Composition |
Si₃N₄ (Silicon Nitride) |
|
Density |
~3.20 g/cm³ |
|
Hardness (Vickers) |
~1500-1800 HV |
|
Fracture Toughness |
~6-7 MPa·m½ |
|
Young’s Modulus (Elastic Modulus) |
~280-320 GPa |
|
Compressive Strength |
~3000-4000 MPa |
|
Flexural Strength (Bending Strength) |
~800-1000 MPa |
|
Coefficient of Thermal Expansion |
~3.2 × 10⁻⁶ /°C (at room temperature to 1000°C) |
|
Thermal Conductivity |
~25-35 W/m·K |
|
Max Service Temperature in Air |
Up to 1200°C (continuous), up to 1400°C (intermittent) |
|
Chemical Resistance |
Excellent resistance to acids, alkalis, and molten metals |
|
Electrical Resistivity |
High (>10¹² Ω·cm at room temperature) |
|
Wear Resistance |
Excellent, suitable for high-wear applications |
|
Thermal Shock Resistance |
Outstanding, capable of withstanding rapid temperature changes |
|
Corrosion Resistance |
Superior, especially in aggressive environments |
|
Self-Lubricating Properties |
Reduces friction in moving parts |
|
Biocompatibility |
Suitable for medical applications |
|
Temperature Measurement Range |
Up to 1200°C continuously, up to 1400°C intermittently |
|
Accuracy and Precision |
High precision with minimal drift over time |
|
Response Time |
Fast response to temperature changes |
|
Nozzle/Probe Dimensions |
Inner diameter, outer diameter, length, and shape can be customized based on application requirements |
|
Surface Finish |
Can be polished or left as-sintered depending on the application needs |
|
Environmental Impact |
Environmentally friendly, no harmful substances |
Applications of Silicon Nitride Thermocouples
High-temperature industry: used for high-temperature measurement in metallurgy, ceramics, glass manufacturing and other industries.
Aerospace: for temperature monitoring of engines and high temperature components.
Energy field: temperature monitoring in gas turbines, nuclear reactors and other high temperature environments.
Scientific research experiments: for precise temperature measurement in material science and high-temperature chemistry experiments.
Automotive industry: for temperature monitoring in engines and exhaust systems.
Packing and Storage
The product is in powder form and should be stored in a cool, ventilated place. Avoid inhalation when using it and keep away from open flames, heat sources, etc.
Company Profile
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.
The company has a professional technical department and Quality Supervision Department, a well-equipped laboratory, and equipped with advanced testing equipment and after-sales customer service center.
If you are looking for high-quality Silicon Nitride Thermocouples please feel free to contact us or click on the needed products to send an inquiry.
Company Profile
Payment Term
T/T, Western Union, Paypal, Credit Card etc.
Shipment Term
By air, by sea, by express, as customers request.
Packaging
FAQs of Silicon Nitride Thermocouples
Question 1: What is the main material used in a silicon nitride thermocouple? What are its properties?
Answer: The main material for silicon nitride thermocouples is silicon nitride (Si₃N₄). Silicon Nitride is suitable for use in extreme environments because of its high temperature stability (can withstand over 1400°C), chemical inertness (corrosion resistance), high mechanical strength (resistance to abrasion and impact), and good resistance to thermal shock.
Question 2: What temperature ranges are Silicon Nitride thermocouples suitable for?
Answer: Silicon Nitride thermocouples are suitable for high temperature environments and are typically stable over the 800°C to 1400°C temperature range, with some specially designed Silicon Nitride thermocouples able to withstand even higher temperatures.
QUESTION 3: In what industrial applications are Silicon Nitride thermocouples important?
Answer: Silicon Nitride thermocouples are widely used in the metallurgical industry, aerospace, energy, ceramics and glass manufacturing, and the automotive industry.
Question 4: What are the advantages of silicon nitride thermocouples over other thermocouples?
Answer: Silicon nitride thermocouple has the advantages of high temperature resistance, corrosion resistance, high mechanical strength, strong thermal shock resistance, good electrical insulation and so on. Not only can it work stably above 1400°C, which is better than many traditional thermocouple materials, but it also has good resistance to acid, alkali and other corrosive media, and it is not easy to wear or break, suitable for harsh environments, and it can withstand rapid temperature changes without damage, which is very suitable for application scenarios that require electrical insulation.
Question 5: What is the life expectancy of Silicon Nitride thermocouples in high temperature environments?
Answer: Silicon Nitride thermocouples have a long service life in high temperature environments, depending on the operating temperature and environmental conditions. In environments below 1400°C, Silicon Nitride thermocouples can operate reliably for hundreds to thousands of hours. However, at higher temperatures or in highly corrosive environments, service life may be shortened and periodic inspection and replacement is required.
