Hafnia vs. Yttria

Both hafnia and yttria are oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is hafnia and the bottom bar is yttria.

Hafnia (Hafnium Oxide, HfO₂)Yttria (Yttrium Oxide, Y₂O₃)

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Material Properties

Density, g/cm³		9.7
Density, g/cm³		5.0

Elastic (Young's, Tensile) Modulus, GPa		57
Elastic (Young's, Tensile) Modulus, GPa		120

Maximum Temperature: Mechanical, °C		2800
Maximum Temperature: Mechanical, °C		2000

Melting Onset (Solidus), °C		2900
Melting Onset (Solidus), °C		2440

Specific Heat Capacity, J/kg-K		120
Specific Heat Capacity, J/kg-K		440

Stiffness to Weight: Axial, points		3.3
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		13
Stiffness to Weight: Bending, points		32

Thermal Conductivity, W/m-K		1.1
Thermal Conductivity, W/m-K		0.3

Thermal Diffusivity, mm²/s		0.95
Thermal Diffusivity, mm²/s		0.14

Thermal Expansion, µm/m-K		6.0
Thermal Expansion, µm/m-K		8.0

Hafnia vs. Yttria

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