Steatite L-5
Steatite L-5 is a grade of steatite. It has the second lowest strength compared to the other variants of steatite. The graph bars on the material properties cards below compare steatite L-5 to other oxide-based engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Thermal Properties
Maximum Temperature: Mechanical
840 °C 1550 °F
Maximum Thermal Shock
160 °C 330 °F
Specific Heat Capacity
860 J/kg-K 0.2 BTU/lb-°F
Thermal Conductivity
2.5 W/m-K 1.5 BTU/h-ft-°F
Thermal Expansion
7.8 µm/m-K
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 Hz
6.0
Dielectric Constant (Relative Permittivity) At 1 MHz
6.4
Dielectric Strength (Breakdown Potential)
16 kV/mm 0.61 V/mil
Electrical Dissipation At 1 Hz
0.0014
Electrical Dissipation At 1 MHz
0.0010
Electrical Resistivity Order of Magnitude
8.0 10x Ω-m
Other Material Properties
Compressive (Crushing) Strength
570 MPa 82 x 103 psi
Density
2.8 g/cm3 170 lb/ft3
Elastic (Young's, Tensile) Modulus
120 GPa 17 x 106 psi
Flexural Strength
140 MPa 21 x 103 psi
Poisson's Ratio
0.23
Tensile Strength: Ultimate (UTS)
67 MPa 9.6 x 103 psi
Common Calculations
Stiffness to Weight: Axial
24 points
Stiffness to Weight: Bending
59 points
Strength to Weight: Axial
6.7 points
Strength to Weight: Bending
13 points
Thermal Diffusivity
1.1 mm2/s
Thermal Shock Resistance
5.1 points
Followup Questions
Further Reading
ASTM C242: Standard Terminology of Ceramic Whitewares and Related Products
Ceramics and Composites: Processing Methods, Narottam P. Bansal and Aldo R. Boccaccini (editors), 2012
IEC 60672-3: Ceramic and glass-insulating materials - Part 3: Specifications for individual materials
Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015