# Steatite L-3

Steatite L-3 is a grade of steatite. It has the lowest strength compared to the other variants of steatite. The graph bars on the material properties cards below compare steatite L-3 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

750 *°C* 1380 *°F*

Maximum Thermal Shock

140 *°C* 280 *°F*

Specific Heat Capacity

860 *J/kg-K* 0.2 *BTU/lb-°F*

Thermal Conductivity

2.5 *W/m-K* 1.4 *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

5.7

Dielectric Strength (Breakdown Potential)

12 *kV/mm* 0.48 *V/mil*

Electrical Dissipation At 1 Hz

0.0047

Electrical Dissipation At 1 MHz

0.0026

Electrical Resistivity Order of Magnitude

10 *10 ^{x} Ω-m*

## Other Material Properties

Compressive (Crushing) Strength

540 *MPa* 78 *x 10 ^{3} psi*

Density

2.6 *g/cm ^{3}* 160

*lb/ft*

^{3}Elastic (Young's, Tensile) Modulus

77 *GPa* 11 *x 10 ^{6} psi*

Flexural Strength

130 *MPa* 19 *x 10 ^{3} psi*

Poisson's Ratio

0.23

Tensile Strength: Ultimate (UTS)

60 *MPa* 8.6 *x 10 ^{3} psi*

## Common Calculations

Stiffness to Weight: Axial

17 *points*

Stiffness to Weight: Bending

55 *points*

Strength to Weight: Axial

6.4 *points*

Strength to Weight: Bending

13 *points*

Thermal Diffusivity

1.1 *mm ^{2}/s*

Thermal Shock Resistance

7.1 *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