StarCeram® N Grade E Silicon Nitride (Si₃N₄)



StarCeram® N Grade E is an electrically conductive silicon nitride. The key benefits of StarCeram® N include: Extremely high strength even up to >1200°C, excellent wear and chipping resistance, high hardness, high fracture toughness, low thermal expansion, average thermal conductivity, very good thermal shock resistance, very good chemical resistance, electrically conductive material available.



Electrical resistivity ρel

1E-3 Ω·m at 20 °C


Density ρ

3.9 g/cm³ at 20 °C


Elastic modulus E

340 GPa at 20 °C

Flexural strength σbend

700 MPa at 20 °C

4-point bending, 40/20mm

Fracture toughness KIC

8.5 MPa·√m at 20 °C

Hardness, Vickers HV

1430 [-] at 20 °C

converted from 14.0 GPa

Weibull modulus mW

15 [-] at 20 °C



Coefficient of thermal expansion α

6E-6 1/K at 20 °C

RT - 1000°C

Max service temperature Tmax

900 °C

Thermal conductivity λ

45 W/(m·K) at 20 °C

Thermal shock parameter R1 R1

280 °C

Technological properties

Application areas

Bearing bushes, protection sleeves, crucibles, cylinder linings, dosing tubes, riser tubes, extruder screws, forming rolls, guide rolls, immersion heater tubes, mill linings, nozzles, slide valves, rotors, sliding rings, thermo protection tubes, thermocouple protection tubes, wear protection parts, welding rolls, centering pins

This material data has been provided by KYOCERA Fineceramics Precision GmbH.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.