Material properties of Technical Ceramics / Engineering Ceramics

Property Unit Al2O3 AlN Al2TiO5 ZrO2 Si3N4 SiC WC/Co Stainless steel
Density kg/dm3 3.9 3.4 3.7 5.9 3.2 3.2 15.0 7.9
Hardness, Vickers (GPa) 17.2 10.6 3.7 11.4 14.0 22.0 13.7 2.0
Bending strength MPa 390 310 30 1000 900 500 2500 200yield 500ult
Compressive strength MPa 2400 1900 200 3000 3600 2200 6000 200yield 500ult
Elastic modulus GPa 380 320 20 210 300 430 600 200
Fracture toughness MPa∙m1/2 5.0 3.7 1.0 9.0 6.5 4.0 12 50
Thermal expansion K-1∙10-6 8.0 4.6 1.0 11.0 3.0 4.2 5.0 17.0
Heat conductivity W/(m∙K) 32 150 1.4 3.0 20 110 95 16
Thermal shock, ΔT K 200 190 1200 300 700 400 650 -
Max use temperature °C 1600 700 900 900 1200 1500 500 800
Volume resistivity Ω∙cm 1013 1014 - 1013 1014 104 2∙10-6 10-4

 

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