Introduction of Silicon Nitride Rings

Silicon nitride rings are high-performance ceramic ring components made of silicon nitride (Si₃N₄) with excellent resistance to heat, wear, and chemical stability. Silicon nitride is an advanced engineering ceramic material known for its high hardness, high strength, and thermal shock resistance. Widely used in mechanical seals, bearings, electronic equipment, and high-temperature industries, silicon nitride rings are efficient, durable, and reliable engineering components.

Features of Silicon Nitride Rings

High hardness and wear resistance: the high hardness of silicon nitride can effectively resist wear and prolong service life.

Excellent high-temperature resistance: able to work stably in high-temperature environments above 1200°C.

Thermal shock resistance: able to withstand rapid temperature changes and suitable for frequent heating and cooling conditions.

Chemical stability: extremely resistant to acids, alkalis, and most molten metals.

Low density: low density (about 3.2 g/cm³) reduces equipment loads and is suitable for high-speed rotary applications.

High mechanical strength: high flexural strength and fracture toughness, able to withstand large mechanical stresses.

Electrical insulation: Maintains good electrical insulation properties at high temperatures and is suitable for electronic and electrical applications.

Self-lubricating: smooth surface and low coefficient of friction, reducing running resistance.

Parameters of Silicon Nitride Rings

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
Ring Dimensions	Inner diameter, outer diameter, and thickness can be customized based on application requirements

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Applications of Silicon Nitride Rings

Mechanical seals and bearings: used as sealing and bearing rings in high-speed rotating equipment, such as pumps, compressors, and turbines; used as mechanical seals in high-temperature, high-wear environments to improve equipment operating efficiency.

Electronics and semiconductor industry: insulating and support rings used in semiconductor manufacturing equipment; used as high-temperature resistant components in high-temperature furnaces and vacuum equipment.

Automotive industry: used as bearing rings and sealing rings in turbochargers to improve engine performance; used as insulation and support parts in motor and battery systems of new energy vehicles.

Chemical industry: used for sealing rings and reactor linings in corrosive media; as corrosion-resistant components in high-temperature catalytic reactions and exhaust gas treatment equipment.

Aerospace: for high-temperature sealing rings and bearing rings in aero-engine and rocket propulsion systems as key components in extreme high-temperature and high-speed environments to ensure equipment reliability.

Energy: High-temperature sealing rings in gas turbines and solid oxide fuel cells (SOFC); high-temperature resistant support and insulation components in solar and nuclear energy equipment.

Laboratories and research institutes: sealing and support rings for high-temperature experimental equipment; high-performance experimental components in materials science research and nanotechnology.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years experience in providing super high-quality chemicals and Nanomaterials.

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 Rings please feel free to contact us or click on the needed products to send an inquiry. 

Payment Term

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

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.

Shipment Term

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

FAQs of Silicon Nitride Rings

Question 1: What are the main characteristics of silicon nitride rings?

Answer: The main features of silicon nitride rings include high hardness and wear resistance: the high hardness of silicon nitride can effectively resist wear and prolong service life; excellent high-temperature resistance: it can work stably in high-temperature environments above 1200°C; thermal shock resistance: it can withstand rapid temperature changes and is suitable for frequent heating and cooling conditions; chemical stability: it has excellent resistance to acids, alkalis, and most molten metal Corrosion; low density and high mechanical strength: low density (about 3.2 g/cm³), and at the same time has high flexural strength and fracture toughness.

Question 2: What are the applications of silicon nitride rings in mechanical seals?

Answer: In mechanical seals, silicon nitride rings are mainly used in the following scenarios: high-speed rotating equipment, such as sealing rings for pumps, compressors, and turbines to reduce leakage and improve efficiency; high-temperature environments: sealing components for high-temperature furnaces and reactors to ensure the reliability of the equipment at extreme temperatures; corrosive media: used as a corrosion-resistant sealing ring in chemical equipment to prolong the service life of the equipment.

Question 3: Why are silicon nitride rings suitable for use in the automotive industry?

Answer: Silicon nitride rings are suitable for use in the automotive industry for a number of reasons, including high-temperature resistance: able to withstand high-temperature environments in turbochargers and engines; abrasion resistance: performs well under high-speed rotation and high-pressure conditions, extending service life; lightweight: low density reduces component weight, helping to improve fuel efficiency; and chemical stability: extremely resistant to corrosive components in fuel and exhaust gases.

QUESTION 4: What is the role of silicon nitride rings in aerospace?

Answer: In the aerospace field, silicon nitride rings are mainly used in the following areas: aviation engines for high-temperature sealing rings and bearing rings to ensure the reliability of the engine under extreme conditions; rocket propulsion systems as a key sealing component in high-temperature and high-speed environments to improve propulsion efficiency; and thermal protection systems: for the protection and sealing of equipment in extreme high-temperature environments.

QUESTION 5: How do I choose the right silicon nitride ring?

Answer: The following factors need to be considered in selecting a suitable silicon nitride ring: operating temperature: select a silicon nitride ring with matched heat resistance according to the maximum temperature of the environment in which it will be used; chemical environment: consider the corrosive nature of the medium and select a silicon nitride ring with the right chemical stability; mechanical stress: select a high-strength silicon nitride ring according to the mechanical stress in the equipment (e.g., pressure, vibration); dimensions and precision: select the right Size and precision: according to the requirements of the equipment, select the appropriate size and processing precision to ensure the reliability of installation and operation; Cost and life: within the budget range, select cost-effective products with long service life; through comprehensive consideration of the above factors, you can choose the most suitable silicon nitride ring for specific application scenarios.