SiAlON vs. Yttria

SiAlON belongs to the non-oxide engineering ceramics classification, while yttria belongs to the oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

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

SiAlON Yttria (Yttrium Oxide, Y₂O₃)

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Material Properties

Compressive (Crushing) Strength, MPa		2620
Compressive (Crushing) Strength, MPa		390

Density, g/cm³		3.3
Density, g/cm³		5.0

Elastic (Young's, Tensile) Modulus, GPa		290
Elastic (Young's, Tensile) Modulus, GPa		120

Maximum Temperature: Mechanical, °C		1200
Maximum Temperature: Mechanical, °C		2000

Specific Heat Capacity, J/kg-K		880
Specific Heat Capacity, J/kg-K		440

Stiffness to Weight: Axial, points		50
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		67
Stiffness to Weight: Bending, points		32

Thermal Conductivity, W/m-K		19
Thermal Conductivity, W/m-K		0.3

Thermal Diffusivity, mm²/s		6.4
Thermal Diffusivity, mm²/s		0.14

Thermal Expansion, µm/m-K		3.6
Thermal Expansion, µm/m-K		8.0

SiAlON vs. Yttria

Material Properties

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