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Yttria vs. Hexagonal Boron Nitride

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

Metric UnitsUS Customary Units

Material Properties

Compressive (Crushing) Strength, MPa 390
21 to 250
Density, g/cm3 5.0
1.9 to 2.1
Elastic (Young's, Tensile) Modulus, GPa 120
14 to 60
Maximum Temperature: Mechanical, °C 2000
1030 to 2350
Specific Heat Capacity, J/kg-K 440
840 to 1610
Stiffness to Weight: Axial, points 13
4.1 to 18
Stiffness to Weight: Bending, points 32
42 to 69
Thermal Conductivity, W/m-K 0.3
29 to 96
Thermal Diffusivity, mm2/s 0.14
9.9 to 34
Thermal Expansion, µm/m-K 8.0
0.54 to 18