Silicon Nitride Thermocouple High Hardness And High Strength Si3N4 Thermocouple

Overview of Silicon Nitride Thermocouple

Silicon nitride thermocouples are specialized temperature-sensing devices made of Silicon nitride (Si₃N₄), a ceramic material known for its special mechanical, thermal, and chemical properties. These thermocouples have high-temperature stability, excellent wear resistance and excellent durability, making them suitable for extreme environments where traditional metal thermocouples may not operate reliably.

Features of Silicon Nitride Thermocouple

High-temperature stability: The silicon nitride thermoelectric strip operates continuously at temperatures up to 1200°c and intermittently up to 1400°c, maintaining structural integrity and accuracy.

Excellent wear resistance: The inherent hardness and durability of plasticized silicon can guarantee long-term stability in horse food or corrosive environments.

Chemically inert: Resistant to acid, alkali and molten metal corrosion, ideal for aggressive chemical environments.

Low thermal expansion: Minimal thermal expansion guarantees stability over a very large temperature range.

Specifications of Silicon Nitride Thermocouple

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 Thermocouple

Aerospace and Automotive: Used in turbine engines, exhaust systems, and other high-temperature components where precise temperature monitoring is critical.

Manufacturing and Machining: Ideal for high-temperature furnaces, heat treatment processes, and metal forming operations.

Chemical Processing: Employed in reactors, distillation columns, and other equipment where corrosive substances are present.

Medical Devices: Suitable for surgical instruments and implants that require accurate temperature sensing.

Semiconductor manufacturing: Used in wafer processing equipment and furnace components, benefiting from the purity and thermal stability of the material.

Energy: Used in fuel cells, nuclear reactors and other high-temperature resistant energy systems.

Company Profile

Advanced Ceramics founded on October 17, 2014, is a high-tech enterprise committed to the research and development, production, processing, sales and technical services of ceramic relative materials and products.. Since its establishment in 2014, the company has been committed to providing customers with the best products and services, and has become a leader in the industry through continuous technological innovation and strict quality management.

Our products includes but not limited to Silicon carbide ceramic products, Boron Carbide Ceramic Products, Boron Nitride Ceramic Products, Silicon Carbide Ceramic Products, Silicon Nitride Ceramic Products, Zirconium Dioxide Ceramic Products, Quartz Products, etc. Please feel free to contact us.(nanotrun@yahoo.com)

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

FAQs of Silicon Nitride Thermocouple

Q: What are the main advantages of silicon nitride thermocouples?

A: The main advantages include high-temperature stability, excellent wear resistance, superior chemical inertness, minimal thermal expansion, and outstanding thermal shock resistance. These properties make silicon nitride thermocouples ideal for extreme environments where traditional metallic thermocouples may not perform reliably.

Q: In which applications are silicon nitride thermocouples typically used?

A: Silicon nitride thermocouples are commonly used in aerospace and automotive turbine engines, exhaust systems, manufacturing furnaces, chemical processing reactors, medical devices requiring sterilization, semiconductor wafer processing equipment, and energy sector components like fuel cells and nuclear reactors. Their ability to withstand harsh conditions ensures precise temperature monitoring in these critical applications.

Q: How do silicon nitride thermocouples perform at high temperatures?

A: Silicon nitride thermocouples can operate continuously at temperatures up to 1200°C or intermittently at temperatures up to 1400°C without degradation; this makes them suitable for high-temperature environments, where accurate and stable temperature measurement is essential.

Q: Are silicon nitride thermocouples resistant to chemicals?

A: Yes, silicon nitride thermocouples have excellent resistance to acid, alkali and molten metal corrosion. This chemical inertness ensures reliable performance in aggressive chemical environments and extends its service life compared to conventional materials.

Q: Can silicon nitride thermocouples be used for medical applications?

A: Of course. Silicon nitride thermocouples are biocompatible and can withstand sterilization processes, making them suitable for surgical instruments and medical implants that require precise temperature sensing and control.