Silicon nitrides (Si3N4) advanced ceramic materials are characterized by their high strength, toughness and hardness combined with chemical and thermal stability.
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Insaco typically works with a Hot Pressed form of Silicon Nitride.
Chemical Formula of Silicon Nitride
The chemical formula of Silicon Nitride is given in the table below:
| Property |
Value* |
| Chemical Formula |
Si3N4 |
* All properties are at room temperature unless otherwise noted.
Mechanical Properties of Silicon Nitride
The mechanical properties of Silicon Nitride are mentioned in the table below:
| Property |
Value* |
| Density |
3.2-3.31 gm/cc |
| Hardness |
1500-2000 Knoop |
| Tensile Strength |
85 kpsi |
| Modulus of Elasticity |
45-49 x 106 psi |
| Flexural Strength |
65-132 kpsi |
| Compressive Strength |
>435-500 kpsi |
| Poisson's Ratio |
0.27 |
| Fracture Toughness |
4-6 MPa m1/2 |
* All properties are at room temperature unless otherwise noted.
Electrical Properties of Silicon Nitride
The electrical properties of Silicon Nitride are mentioned in the table below:
| Property |
Value* |
| Dielectric Strength |
17700 ac V/mm |
| Dielectric Constant |
8.4(@ 1 MHz) |
| Volume Resistivity |
>1013 ohm-cm |
* All properties are at room temperature unless otherwise noted.
Thermal Properties of Silicon Nitride
The thermal properties of Silicon Nitride are mentioned in the table below:
| Property |
Value* |
| Coefficient of Thermal Expansion |
3.0-3.9 x 10-6/°C |
| Thermal Conductivity |
15-30 W/mK |
| Specific Heat |
0.13 cal/g°C |
| Maximum Working Temperature |
1200°C |
| Shock Resistance |
750°C Diff. |
* All properties are at room temperature unless otherwise noted.
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This information has been sourced, reviewed and adapted from materials provided by INSACO Inc.
For more information on this source, please visit INSACO Inc.