Silicon Nitride (Si3N4) Properties and Applications

Material: Silicon Nitride (Si3N4) Properties and Applications
Composition: Si3N4
Property Minimum Value (S.I.) Maximum Value (S.I.) Units (S.I.) Minimum Value (Imp.) Maximum Value (Imp.) Units (Imp.)
Atomic Volume (average) 0.0058 0.006 m3/kmol 353.938 366.142 in3/kmol
Density 2.37 3.25 Mg/m3 147.954 202.891 lb/ft3
Energy Content 150 200 MJ/kg 16250.8 21667.7 kcal/lb
Bulk Modulus 120 241 GPa 17.4045 34.9541 106 psi
Compressive Strength 524 5500 MPa 75.9998 797.708 ksi
Ductility 0.00031 0.00169 0.00031 0.00169 NULL
Elastic Limit 60 525 MPa 8.70226 76.1448 ksi
Endurance Limit 44 470 MPa 6.38166 68.1677 ksi
Fracture Toughness 1.8 6.5 MPa.m1/2 1.63808 5.9153 ksi.in1/2
Hardness 8000 30500 MPa 1160.3 4423.65 ksi
Loss Coefficient 2e-005 5e-005 2e-005 5e-005 NULL
Modulus of Rupture 181 1050 MPa 26.2518 152.29 ksi
Poisson's Ratio 0.23 0.28 0.23 0.28 NULL
Shear Modulus 65.3 127 GPa 9.47096 18.4198 106 psi
Tensile Strength 60 525 MPa 8.70226 76.1448 ksi
Young's Modulus 166 297 GPa 24.0763 43.0762 106 psi
Glass Temperature K °F
Latent Heat of Fusion 930 1550 kJ/kg 399.826 666.377 BTU/lb
Maximum Service Temperature 1346 1773 K 1963.13 2731.73 °F
Melting Point 2661 2769 K 4330.13 4524.53 °F
Minimum Service Temperature 0 0 K -459.67 -459.67 °F
Specific Heat 673 1100 J/kg.K 0.520807 0.851244 BTU/lb.F
Thermal Conductivity 10 43 W/m.K 18.7203 80.4974 BTU.ft/h.ft2.F
Thermal Expansion 1.4 3.7 10-6/K 2.52 6.66 10-6/°F
Breakdown Potential 16 20 MV/m 406.4 508 V/mil
Dielectric Constant 9.5 10.5 9.5 10.5 NULL
Resistivity 1e+016 1e+021 10-8 ohm.m 1e+016 1e+021 10-8 ohm.m
Environmental Properties
  Resistance Factors
1=Poor 5=Excellent
Flammability 5
Fresh Water 5
Organic Solvents 5
Oxidation at 500C 5
Sea Water 5
Strong Acid 4
Strong Alkalis 3
UV 5
Wear 5
Weak Acid 5
Weak Alkalis 5

This data is provided subject to AZoM.com's terms and conditions. Data reproduced with permission of Granta Design Limited www.grantadesign.com and Ceram Research Limited www.ceram.co.uk

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