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Steatite vs. Hexagonal Boron Nitride

Steatite belongs to the oxide-based engineering ceramics classification, while hexagonal boron nitride belongs to the non-oxide engineering ceramics. There are 17 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is steatite and the bottom bar is hexagonal boron nitride.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 540 to 620
21 to 250
Elastic (Young's, Tensile) Modulus, GPa 68 to 120
14 to 60
Flexural Strength, MPa 32 to 150
18 to 140
Poisson's Ratio 0.23
0.11

Thermal Properties

Maximum Temperature: Mechanical, °C 750 to 1230
1030 to 2350
Specific Heat Capacity, J/kg-K 850 to 860
840 to 1610
Thermal Conductivity, W/m-K 1.8 to 2.5
29 to 96
Thermal Expansion, µm/m-K 7.0 to 9.0
0.54 to 18

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 5.7 to 6.5
4.0 to 4.4
Dielectric Strength (Breakdown Potential), kV/mm 7.9 to 16
61 to 200
Electrical Dissipation At 1 Hz 0.0014 to 0.022
0.0017
Electrical Dissipation At 1 MHz 0.0010 to 0.0060
0.00075 to 0.0018
Electrical Resistivity Order of Magnitude, 10x Ω-m 8.0 to 11
13 to 15

Otherwise Unclassified Properties

Density, g/cm3 1.9 to 2.8
1.9 to 2.1

Common Calculations

Stiffness to Weight: Axial, points 14 to 32
4.1 to 18
Stiffness to Weight: Bending, points 52 to 83
42 to 69
Thermal Diffusivity, mm2/s 0.79 to 1.1
9.9 to 34