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Alumina vs. Wollastonite

Both alumina and wollastonite are oxide-based engineering ceramics. There are 7 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

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

Metric UnitsUS Customary Units

Material Properties

Compressive (Crushing) Strength, MPa 1920 to 2750
260
Density, g/cm3 3.4 to 4.1
2.8
Dielectric Constant (Relative Permittivity) At 1 MHz 7.8 to 11
3.5
Dielectric Strength (Breakdown Potential), kV/mm 8.9 to 12
6.0
Flexural Strength, MPa 260 to 430
100
Maximum Temperature: Mechanical, °C 650 to 1730
1200
Thermal Conductivity, W/m-K 14 to 30
0.8