MakeItFrom.com
Menu (ESC)
Home>Non-Oxide Engineering CeramicUp Two>Silicon NitrideUp One

Silicon Nitride vs. Hafnia

Silicon 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 (8, 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 silicon nitride and the bottom bar is hafnia.

Silicon Nitride (Si3N4)Hafnia (Hafnium Oxide, HfO2)
Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.2 to 3.4
9.7
Elastic (Young's, Tensile) Modulus, GPa 140 to 310
57
Electrical Resistivity Order of Magnitude, 10x Ω-m 11 to 12
9.0
Maximum Temperature: Mechanical, °C 1000 to 1330
2800
Specific Heat Capacity, J/kg-K 720 to 800
120
Stiffness to Weight: Axial, points 34 to 53
3.3
Stiffness to Weight: Bending, points 65 to 78
13
Thermal Conductivity, W/m-K 12 to 31
1.1
Thermal Diffusivity, mm2/s 7.5 to 13
0.95
Thermal Expansion, µm/m-K 2.5 to 3.2
6.0