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Engineering Porcelain vs. Beryllia

Both engineering porcelain and beryllia are oxide-based engineering ceramics. There are 21 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 590
1650
Elastic (Young's, Tensile) Modulus, GPa 67 to 150
350
Flexural Strength, MPa 43 to 160
240
Poisson's Ratio 0.17
0.26
Shear Modulus, GPa 34
180
Tensile Strength: Ultimate (UTS), MPa 130
140

Thermal Properties

Maximum Temperature: Mechanical, °C 1170
1750
Specific Heat Capacity, J/kg-K 600 to 1000
1050
Thermal Conductivity, W/m-K 1.8 to 6.5
270
Thermal Expansion, µm/m-K 2.0 to 6.6
8.0

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 6.5
6.6
Dielectric Strength (Breakdown Potential), kV/mm 11 to 25
11
Electrical Dissipation At 1 MHz 0.00043 to 0.013
0.00060
Electrical Resistivity Order of Magnitude, 10x Ω-m 9.0 to 12
13

Otherwise Unclassified Properties

Density, g/cm3 2.3 to 3.0
2.9

Common Calculations

Stiffness to Weight: Axial, points 16 to 29
67
Stiffness to Weight: Bending, points 49 to 65
82
Strength to Weight: Axial, points 12 to 16
14
Strength to Weight: Bending, points 19 to 25
21
Thermal Diffusivity, mm2/s 0.73 to 3.9
89
Thermal Shock Resistance, points 11 to 53
3.6