Silicon Nitride Tube High Hardness And High Strength Si3N4 Tube

Overview of Silicon Nitride Tube

Silicon nitride tubes are advanced ceramic components made of silicon nitride (Si₃N₄), known for their superior mechanical, thermal, and chemical properties. With high strength, excellent wear resistance, low density and excellent fracture toughness, these tubes are suitable for a variety of demanding applications.

Features of Silicon Nitride Tube

High Strength and Durability: Silicon nitride tubes exhibit remarkable compressive and flexural strength, ensuring durability even under extreme conditions.

Excellent Thermal Properties: They maintain stability at high temperatures, up to 1200°C in continuous use and up to 1400°C intermittently, with minimal thermal expansion and outstanding thermal shock resistance.

Chemically inert: Highly resistant to corrosion by acids, alkalis and molten metals, making it ideal for aggressive chemical environments.

Low density: With a density of about 3.20 g/cm³, these tubes reduce weight without compromising strength compared to metal alternatives.

Self-Lubricating: The inherent lubricity reduces friction, is beneficial for moving parts and leads to reduced maintenance needs.

Electrical Insulation: Excellent electrical resistivity makes silicon nitride tubes suitable for electrical insulation applications.

Fracture Toughness: Superior fracture toughness ensures better impact resistance and reduced likelihood of cracking under stress.

Wear Resistance: Outstanding wear resistance also makes them ideal for high-wear applications like cutting tools and bearings.

Biocompatibility: Suitable for medical applications due to biocompatibility and resistance to sterilization processes.

Specifications of Silicon Nitride Tube

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
Environmental Impact	Environmentally friendly, no harmful substances
Tube Dimensions	Inner diameter, outer diameter, and length can be customized based on application requirements

Silicon Nitride Tube

Applications of Silicon Nitride Tube

Aerospace and Automotive: Utilized in turbine engines, exhaust systems, and other high-temperature components due to excellent thermal stability and resistance to thermal shock.

Manufacturing and Machining: Ideal for cutting tools, grinding wheels, and wear-resistant components, benefiting from high hardness and durability.

Chemical processing: Used in pumps, valves and piping systems where corrosion resistance is essential.

Medical devices: Suitable for surgical instruments and implants, with biocompatibility and anti-sterilization.

Ceramic bearings: Preferred for applications requiring minimal lubrication and high-speed performance, such as electric motors and industrial machinery.

Semiconductor manufacturing: Use the purity and thermal stability of materials for wafer processing equipment and furnace components.

Energy sector: For fuel cells and nuclear reactors, silicon nitride’s ability to withstand extreme conditions is critical.

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 Tube

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

A: The main advantages include high hardness, excellent wear resistance, low density, superior fracture toughness, outstanding thermal stability, and exceptional chemical inertness. These properties make silicon nitride tubes ideal for high-performance applications in extreme conditions.

Q: In which industries are silicon nitride tubes commonly used?

A: Silicon nitride tubes are widely used in aerospace, automotive, manufacturing, chemical processing, medical equipment, ceramic bearings, semiconductor manufacturing and energy fields. Their capability to endure harsh conditions and deliver consistent performance makes them highly versatile across these industries.

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

A: The silicon nitride tube maintains its mechanical properties at high temperatures, and the continuous working temperature can reach 1200℃, and the intermittent working temperature can reach 1400℃; this makes them suitable for applications that require high-temperature stability, such as turbine engines and exhaust systems.

Q: Is silicon nitride resistant to chemicals?

A: Yes, silicon nitride has excellent chemical inertia and corrosion resistance. It is resistant to acids, alkalis and molten metals, making it ideal for use in aggressive chemical environments such as pumps and valves.

Q: Can silicon nitride tubes be used in medical applications?

A: Of course. Silicon nitride tubes are biocompatible, resistant to sterilization, and suitable for surgical instruments and implants. Their durability and inertia ensure the long-term performance of medical devices.