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Beryllia vs. Steatite

Both beryllia and steatite are oxide-based engineering ceramics. There are 20 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is beryllia and the bottom bar is steatite.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 1650
540 to 620
Elastic (Young's, Tensile) Modulus, GPa 350
68 to 120
Flexural Strength, MPa 240
32 to 150
Poisson's Ratio 0.26
0.23
Tensile Strength: Ultimate (UTS), MPa 140
60 to 220

Thermal Properties

Maximum Temperature: Mechanical, °C 1750
750 to 1230
Specific Heat Capacity, J/kg-K 1050
850 to 860
Thermal Conductivity, W/m-K 270
1.8 to 2.5
Thermal Expansion, µm/m-K 8.0
7.0 to 9.0

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 6.6
5.7 to 6.5
Dielectric Strength (Breakdown Potential), kV/mm 11
7.9 to 16
Electrical Dissipation At 1 MHz 0.00060
0.0010 to 0.0060
Electrical Resistivity Order of Magnitude, 10x Ω-m 13
8.0 to 11

Otherwise Unclassified Properties

Density, g/cm3 2.9
1.9 to 2.8

Common Calculations

Stiffness to Weight: Axial, points 67
14 to 32
Stiffness to Weight: Bending, points 82
52 to 83
Strength to Weight: Axial, points 14
6.4 to 32
Strength to Weight: Bending, points 21
13 to 42
Thermal Diffusivity, mm2/s 89
0.79 to 1.1
Thermal Shock Resistance, points 3.6
5.1 to 33