| Property* | Value |
|---|---|
| General | |
| Chemical Formula | Si3N4 |
| Mechanical | |
| 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 m½ |
| Electrical | |
| Dielectric Strength | 17700 ac V/mm |
| Dielectric Constant | 8.4 (@ 1 MHz) |
| Volume Resistivity | > 1013 ohm-cm |
| Thermal | |
| 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. Engineering data are representative, and are not intended as absolute nor warrantable. Manufacturer’s Data shown is blended from multiple sources and therefore illustrates the marketplace. | |
Insaco typically works with a Hot Pressed form of this material.
Wikipedia Reference for Silicon Nitride
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