# Steatite L-4

Steatite L-4 is a grade of steatite. The graph bars on the material properties cards below compare steatite L-4 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.

## Mechanical Properties

Compressive (Crushing) Strength

620 *MPa* 90 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

80 *GPa* 12 *x 10 ^{6} psi*

Flexural Strength

150 *MPa* 21 *x 10 ^{3} psi*

Poisson's Ratio

0.23

Tensile Strength: Ultimate (UTS)

69 *MPa* 10 *x 10 ^{3} psi*

## Thermal Properties

Maximum Temperature: Mechanical

1230 *°C* 2240 *°F*

Maximum Thermal Shock

100 *°C* 210 *°F*

Specific Heat Capacity

860 *J/kg-K* 0.21 *BTU/lb-°F*

Thermal Conductivity

2.5 *W/m-K* 1.4 *BTU/h-ft-°F*

Thermal Expansion

8.2 *µm/m-K*

## Other Material Properties

Density

2.7 *g/cm ^{3}* 170

*lb/ft*

^{3}Dielectric Constant (Relative Permittivity) At 1 MHz

5.9

Dielectric Strength (Breakdown Potential)

8.9 *kV/mm* 0.35 *V/mil*

Electrical Resistivity Order of Magnitude

11 *10 ^{x} Ω-m*

## Common Calculations

Stiffness to Weight: Axial

16 *points*

Stiffness to Weight: Bending

53 *points*

Strength to Weight: Axial

7.1 *points*

Strength to Weight: Bending

14 *points*

Thermal Diffusivity

1.1 *mm ^{2}/s*

Thermal Shock Resistance

7.5 *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

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