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Formula: Si₃N₄
Form: Foil
Material: Reaction Bonded Silicon Nitride/Si3N4
Commodity: Ceramics
Goodfellow's Reaction Bonded Silicon Nitride/Si3N4 sheets are ceramic sheets made by reaction bonding of silicon powder and silicon nitride. With high hardness and strength at elevated temperatures, as well as good thermal shock and oxidation resistance, they have applications in automotive engine components, gas turbines and cutting tools. We offer Si3N4 sheets in 6 variations with minor differences in density, porosity, and grain size to accommodate different high-temperature engineering needs.
Tolerances
Foil
| Thickness | ±20% |
|---|
Material Properties for Ceramics
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Fair |
| Acids - dilute | Good |
| Alkalis | Fair |
| Halogens | Good |
| Metals | Fair |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant | 10 |
| Volume resistivity( Ohmcm ) | >10⁷@25 |
Physical Properties
| Element | Value |
|---|---|
| Apparent porosity( % ) | 15-23 |
| Density( gcm⁻³ ) | 2.4 |
Thermal Properties
| Element | Value |
|---|---|
| Upper continuous use temperature( C ) | 1200-1500 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 690@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 10-16@20°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 3.3@20-1000°C |
Mechanical Properties
| Element | Value |
|---|---|
| Tensile modulus( GPa ) | 170-220 |
| Hardness - Vickers( kgf mm⁻² ) | 800-1000 |
| Shear strength( MPa ) | 190-240 |
| Tensile strength( MPa ) | 160 |
Pultrusions
| Element | Value |
|---|---|
| Compressive strength( MPa ) | 550-650 |
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1000C Glassy Carbon (RVC) Sheet Formula: C
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