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Hafnia vs. CVD Diamond

Hafnia belongs to the oxide-based engineering ceramics classification, while CVD diamond belongs to the non-oxide engineering ceramics. There are 9 material properties with values for both materials. Properties with values for just one material (12, 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 hafnia and the bottom bar is CVD diamond.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 9.7
3.5
Elastic (Young's, Tensile) Modulus, GPa 57
1050
Electrical Resistivity Order of Magnitude, 10x Ω-m 9.0
13
Specific Heat Capacity, J/kg-K 120
500
Stiffness to Weight: Axial, points 3.3
170
Stiffness to Weight: Bending, points 13
96
Thermal Conductivity, W/m-K 1.1
1900
Thermal Diffusivity, mm2/s 0.95
1080
Thermal Expansion, µm/m-K 6.0
1.0