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Graphite vs. Zirconia

Graphite belongs to the non-oxide engineering ceramics classification, while zirconia belongs to the oxide-based engineering ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is graphite and the bottom bar is zirconia.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 90
1260 to 3080
Elastic (Young's, Tensile) Modulus, GPa 21
190 to 200
Flexural Strength, MPa 80
630 to 970
Tensile Strength: Ultimate (UTS), MPa 18
410 to 450

Thermal Properties

Maximum Temperature: Mechanical, °C 220
500 to 1330
Thermal Conductivity, W/m-K 6.0
2.2 to 4.3
Thermal Expansion, µm/m-K 4.9
8.8 to 9.5

Otherwise Unclassified Properties

Density, g/cm3 1.8
5.7 to 6.0

Common Calculations

Stiffness to Weight: Axial, points 6.7
Stiffness to Weight: Bending, points 53
33 to 34
Strength to Weight: Axial, points 2.9
19 to 22
Strength to Weight: Bending, points 8.7
21 to 23
Thermal Shock Resistance, points 12
15 to 19