# Porous Steatite (IEC 60672 Type C-230)

C-230 steatite is a grade of steatite. The graph bars on the material properties cards below compare C-230 steatite 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

1200 *°C* 2190 *°F*

Maximum Thermal Shock

100 *°C* 210 *°F*

Specific Heat Capacity

850 *J/kg-K* 0.2 *BTU/lb-°F*

Thermal Conductivity

1.8 *W/m-K* 1.0 *BTU/h-ft-°F*

Thermal Expansion

9.0 *µm/m-K*

## Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz

6.5

Dielectric Strength (Breakdown Potential)

7.9 *kV/mm* 0.31 *V/mil*

Electrical Resistivity Order of Magnitude

11 *10 ^{x} Ω-m*

## Other Material Properties

Density

1.9 *g/cm ^{3}* 120

*lb/ft*

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

110 *GPa* 16 *x 10 ^{6} psi*

Flexural Strength

32 *MPa* 4.6 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

220 *MPa* 32 *x 10 ^{3} psi*

## Common Calculations

Stiffness to Weight: Axial

32 *points*

Stiffness to Weight: Bending

83 *points*

Strength to Weight: Axial

32 *points*

Strength to Weight: Bending

42 *points*

Thermal Diffusivity

1.1 *mm ^{2}/s*

Thermal Shock Resistance

16 *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