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Hafnia vs. Engineering Porcelain

Both hafnia and engineering porcelain are oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (18, 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 engineering porcelain.

Hafnia (Hafnium Oxide, HfO2)Engineering Porcelain
Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 9.7
2.3 to 3.0
Elastic (Young's, Tensile) Modulus, GPa 57
67 to 150
Electrical Resistivity Order of Magnitude, 10x Ω-m 9.0
9.0 to 12
Maximum Temperature: Mechanical, °C 2800
1170
Specific Heat Capacity, J/kg-K 120
600 to 1000
Stiffness to Weight: Axial, points 3.3
16 to 29
Stiffness to Weight: Bending, points 13
49 to 65
Thermal Conductivity, W/m-K 1.1
1.8 to 6.5
Thermal Diffusivity, mm2/s 0.95
0.73 to 3.9
Thermal Expansion, µm/m-K 6.0
2.0 to 6.6