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Engineering Porcelain vs. Hafnia

Both engineering porcelain and hafnia 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 engineering porcelain and the bottom bar is hafnia.

Engineering PorcelainHafnia (Hafnium Oxide, HfO2)
Metric UnitsUS Customary Units

Material Properties

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