information centre / Ceramic material / Introduction of Silicon Nitride Ceramic Materials
Introduction of Silicon Nitride Ceramic Materials
Introduction
Silicon nitride (Si3N4) offers excellent thermal shock resistance and high temperature strength, ideal for automotive engines, gas turbines, and aerospace applications. It’s used in turbocharger rotors, diesel engine glow plugs, and electrical connectors, providing long-term stability in high-temperature and high-pressure conditions.
Contact Us
Live
E-mail:sales01@hkceramic.com
Specifications｜Support customization
| Plate material mm (L, H, and W can be selected as needed, customization supported) | ||||||||||||
| L | 3 | 5 | 8 | 10 | 12 | 15 | 18 | 20 | 22 | 25 | 28 | More (Customizable) |
| W*H | 100*100 | 90*140 | 95*145 | 150*150 | 160*160 | 122*290 | 110*275 | More (Customizable) | ||||
| Rod material mm (W, Ø can be selected as needed, customization supported) | ||||||||||||
| Ø | 0.5 | 0.8 | 0.9 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | More (Customizable) |
| W | 60 | 100 | 120 | 200 | More (Customizable) | |||||||
Features
Silicon nitride (Si3N4) is an advanced engineering ceramic material known for its excellent high-temperature performance and superior mechanical properties.
1. High Strength and Fracture Toughness at High Temperatures
Silicon nitride exhibits high strength and excellent fracture toughness at elevated temperatures, making it an ideal choice for many high-temperature applications.
- Automotive Engine Components: Silicon nitride is widely used in high-temperature structural components of automotive engines such as piston rings, turbocharger turbine blades, and fuel injectors. Its high strength and wear resistance allow these components to operate stably in high-temperature, high-pressure, and harsh environments, thereby enhancing engine efficiency and reliability.
- Gas Turbine and Combustion Chamber Components: Silicon nitride is also extensively used in gas turbine and combustion chamber components such as turbine bearings, combustion chamber liners, and nozzles. Its high temperature strength and corrosion resistance enable these components to operate reliably in high-temperature and high-pressure environments, improving equipment performance and longevity.
2. Low Thermal Expansion Coefficient and Extremely High Thermal Shock Resistance
Silicon nitride features a low thermal expansion coefficient and extremely high thermal shock resistance, making it perform exceptionally well in high-temperature environments.
- Low Thermal Expansion Coefficient: The low thermal expansion coefficient of silicon nitride means it exhibits minimal deformation at high temperatures, making it particularly suitable for applications requiring stable dimensions and shapes, such as high-temperature furnaces and heat treatment equipment.
- Extremely High Thermal Shock Resistance: Silicon nitride demonstrates extremely high thermal shock resistance, maintaining its strength and integrity even under rapid temperature changes. This characteristic makes it highly beneficial for applications that undergo frequent temperature cycling, such as thermocouples and spark plug insulators.
The unique combination of properties in silicon nitride allows it to be widely used in high-temperature, high-pressure, and harsh environments. From the automotive industry to the energy sector, and from aerospace to industrial manufacturing, silicon nitride plays a crucial role in providing reliable material solutions for various high-temperature structural components. Its outstanding performance and durability not only enhance equipment efficiency and reliability but also drive technological advancement and innovation.
Physical properties
| Material Properties & Physical Performance | Units | Typical Values |
| Density | g/cm3 | >3.2 |
| Hardness | HRA90 | |
| Vickers Hardness (Hv50) | HV0.5 | >1550 |
| Modulus of Elasticity | Gpa | 290 |
| Flexural Strength | Mpa | >600 |
| Compressive Strength | Mpa | 2500 |
| racture toughness | Mpam1/2 | >6.0 |
Thermal properties
| The rmodynamic property | Units | Typical Values |
| Maximum Use Temperature | ℃ | 1200 |
| Thermal Conductivity | W/(m·K) | 15-20 |
| Thermal Expansion Coefficient | 10-6/℃ | >3.1 |
| Thermal Shock Resistance | △T℃ | 500 |
| Specific Heat Capacity | KJ/kg.K | 700 |
Electrical properties
| Electricl Protperties | Units | Typical Values |
| Dielectric Strength | KV/mm | 1 |
| Dielectric Constant | ||
| Volume Resistivity at 20°C | Ω.cm | 1.0×1012 |
*Values are typical material properties, actual values may vary due to product configuration and manufacturing process.
*For more details, please feel free to contact our company.
*For more details, please feel free to contact our company.
Other
Precision ceramic products
Zirconia ceramic cutting blade
Material：Zirconia Ceramics
Describe：Custom zirconia ceramic cutting blade designed for precise cutting of lithium battery separators. Known for its exceptional hardness and wear resistance, this blade maintains sharpness for extended cutting performance. Featuring multiple holes and precise mounting points, it ensures stable and precise alignment during high-speed operations.
Alumina ceramic flange tube
Material：Alumina ceramics
Describe：Custom alumina ceramic flange tubes, or threaded pipe fittings, feature precise threading and multiple-hole designs for secure connection and sealing. With high hardness and strength, they ensure stable, durable performance under high-pressure and friction conditions.
Alumina Ceramic Hollow Tube
Material：Alumina ceramics
Describe：Alumina Ceramic Hollow Tube, essential in high-tech and industrial sectors, offers excellent physical and chemical properties. Its high-purity alumina base and precision manufacturing ensure exceptional performance in extreme environments, from high temperatures to precise electrical insulation. Whether for structural support or electrical insulation, these tubes deliver reliable, durable performance.
Silicon carbide ceramic bars
Material：Silicon Carbide Ceramics
Describe：Custom silicon carbide (SiC) ceramic clamp bars offer secure fixing in mechanical equipment, with high pressure and friction resistance for extended lifespan.
Silicon carbide ceramic molds
Material：Silicon Carbide Ceramics
Describe：Custom silicon carbide (SiC) ceramic molds offer high-temperature and pressure resistance, ensuring precise and consistent production results.
Zirconia ceramic head cap
Material：Zirconia Ceramics
Describe：Zirconia ceramic head caps provide insulation and thermal protection for electrical components with smooth surfaces and precise designs. Their high hardness and strength ensure reliable performance under extreme pressure and temperature, ensuring equipment longevity and stability.