Wollastonite vs. Silicon Nitride

Wollastonite belongs to the oxide-based engineering ceramics classification, while silicon nitride belongs to the non-oxide engineering ceramics. There are 7 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is wollastonite and the bottom bar is silicon nitride.

Wollastonite Silicon Nitride (Si₃N₄)

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Material Properties

Compressive (Crushing) Strength, MPa		260
Compressive (Crushing) Strength, MPa		600 to 2950

Density, g/cm³		2.8
Density, g/cm³		2.2 to 3.4

Dielectric Constant (Relative Permittivity) At 1 MHz		3.5
Dielectric Constant (Relative Permittivity) At 1 MHz		8.0 to 10

Dielectric Strength (Breakdown Potential), kV/mm		6.0
Dielectric Strength (Breakdown Potential), kV/mm		18

Flexural Strength, MPa		100
Flexural Strength, MPa		130 to 810

Maximum Temperature: Mechanical, °C		1200
Maximum Temperature: Mechanical, °C		1000 to 1330

Thermal Conductivity, W/m-K		0.8
Thermal Conductivity, W/m-K		12 to 31

Wollastonite vs. Silicon Nitride

Material Properties

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