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Hexagonal Boron Nitride vs. Hafnia

Hexagonal boron nitride belongs to the non-oxide engineering ceramics classification, while hafnia belongs to the oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (9, 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 hexagonal boron nitride and the bottom bar is hafnia.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 1.9 to 2.1
9.7
Elastic (Young's, Tensile) Modulus, GPa 14 to 60
57
Electrical Resistivity Order of Magnitude, 10x Ω-m 13 to 15
9.0
Maximum Temperature: Mechanical, °C 1030 to 2350
2800
Specific Heat Capacity, J/kg-K 840 to 1610
120
Stiffness to Weight: Axial, points 4.1 to 18
3.3
Stiffness to Weight: Bending, points 42 to 69
13
Thermal Conductivity, W/m-K 29 to 96
1.1
Thermal Diffusivity, mm2/s 9.9 to 34
0.95
Thermal Expansion, µm/m-K 0.54 to 18
6.0