Silicon Nitride Ceramics

Silicon nitride is known as one of the hardest substances in the world. It is famous for its excellent mechanical strength, thermal stability and low density. It is an inorganic ceramic material that does not shrink during sintering. It can maintain reliability in extreme environments and is widely used in applications such as semiconductors, automobiles, and industrial machinery.

Silicon Nitride Advantages

High strength and stiffness even at elevated temperatures
Superior thermal shock resistance compared to alumina and zirconia
Excellent wear and corrosion resistance
Lightweight with high fracture toughness
Electrical insulation with good thermal conductivity
Outstanding performance under high-speed and high-load conditions

Silicon Nitride Application

Semiconductor Industry: Wafer handling components, heater bases, insulators
Aerospace & Defense: Bearings, turbine components, structural parts
Automotive: Engine components, turbocharger rotors, glow plugs
Industrial Equipment: Cutting tools, pump seals, precision bearings
Medical Devices: Surgical tools and high-temperature components

Material Properties

Mechanical Properties	Unit	Silicon Nitride
Density	g/cm³	3.2
Hardness	GPa	15
Flexural Strength	MPa	1000
Compressive Strength	MPa	3000
Elastic Modulus	GPa	320
Fracture Toughness	MPa·m¹ᐟ²	8
Poisson’s Ratio	—	0.26
Young’s Modulus	GPa	320

Thermal Properties	Unit	Silicon Nitride
Thermal Conductivity	W/m·K	25
Melting Point	°C	1900
Specific Heat	J/g·K	0.71
Coefficient of Thermal Expansion	×10⁻⁶/K	3.2
Maximum Operating Temperature	°C	1400

Property	Unit	Silicon Nitride
Dielectric Constant	1 MHz	8
Dielectric Strength	V/μm	>10
Dielectric Loss	1 MHz	0.001
Electrical Resistivity	Ω·cm	10¹⁴

Silicon Nitride Ceramics Machining

We specialize in precision machining of silicon nitride components with tight tolerances and excellent surface finish. Our advanced CNC equipment ensures high strength, thermal shock resistance, and dimensional stability for demanding applications in aerospace, semiconductor, and industrial equipment. Contact us today for professional assistance from our team of experts.