Silicon nitride is one of the hardest substances in the world, renowned for its excellent mechanical strength, thermal stability, and low density. It is an inorganic ceramic material that does not shrink during sintering. Silicon nitride maintains its reliability even in extreme environments and is widely used in semiconductors, automobiles, and industrial machinery.
Silicon nitride is extremely hard and difficult to machine, with a high risk of edge chipping during precision processing. With advanced machining and grinding capabilities, we manufacture high-precision, complex silicon nitride ceramic components with tight tolerances, precision holes, threads, and controlled surface finishes to meet demanding application requirements.
The table below lists the material properties of our aluminum nitride ceramics. These parameters are for reference only, and slight differences may exist between different batches of products.
| 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·m1/2 | 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 carbide (SiC) ceramics possess extremely high hardness, thermal conductivity, and excellent wear resistance, corrosion resistance, and thermal shock resistance. They maintain stability even under extreme temperatures and harsh environments, making them ideal materials for high-performance applications such as semiconductor devices, aerospace components, and precision mechanical systems.
Macor is a machinable glass-ceramic made from fluorophlogopite mica crystals embedded in a borosilicate glass matrix. This composition gives it a rare
combination of metal-like machinability, excellent electrical insulation, low thermal conductivity, and stability up to 1000°C (no load) while maintaining very tight tolerances.
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