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Steatite vs. Engineering Porcelain

Both steatite and engineering porcelain are oxide-based engineering ceramics. There are 23 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 steatite and the bottom bar is engineering porcelain.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 540 to 620
590
Elastic (Young's, Tensile) Modulus, GPa 68 to 120
67 to 150
Flexural Strength, MPa 32 to 150
43 to 160
Poisson's Ratio 0.23
0.17
Tensile Strength: Ultimate (UTS), MPa 60 to 220
130

Thermal Properties

Maximum Temperature: Mechanical, °C 750 to 1230
1170
Maximum Thermal Shock, °C 90 to 160
170 to 290
Specific Heat Capacity, J/kg-K 850 to 860
600 to 1000
Thermal Conductivity, W/m-K 1.8 to 2.5
1.8 to 6.5
Thermal Expansion, µm/m-K 7.0 to 9.0
2.0 to 6.6

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 6.0
5.0 to 10
Dielectric Constant (Relative Permittivity) At 1 MHz 5.7 to 6.5
6.5
Dielectric Strength (Breakdown Potential), kV/mm 7.9 to 16
11 to 25
Electrical Dissipation At 1 Hz 0.0014 to 0.022
0.0043 to 0.028
Electrical Dissipation At 1 MHz 0.0010 to 0.0060
0.00043 to 0.013
Electrical Resistivity Order of Magnitude, 10x Ω-m 8.0 to 11
9.0 to 12

Otherwise Unclassified Properties

Density, g/cm3 1.9 to 2.8
2.3 to 3.0

Common Calculations

Stiffness to Weight: Axial, points 14 to 32
16 to 29
Stiffness to Weight: Bending, points 52 to 83
49 to 65
Strength to Weight: Axial, points 6.4 to 32
12 to 16
Strength to Weight: Bending, points 13 to 42
19 to 25
Thermal Diffusivity, mm2/s 0.79 to 1.1
0.73 to 3.9
Thermal Shock Resistance, points 5.1 to 33
11 to 53