# IEC 60672 Type C-520 Porous Cordierite

C-520 porous cordierite is a grade of cordierite. The graph bars on the material properties cards below compare C-520 porous cordierite 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

420 *MPa* 61 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

62 *GPa* 8.9 *x 10 ^{6} psi*

Flexural Strength

32 *MPa* 4.7 *x 10 ^{3} psi*

Fracture Toughness

2.0 *MPa-m ^{1/2}* 1.8

*x 10*

^{3}psi-in^{1/2}Tensile Strength: Ultimate (UTS)

190 *MPa* 28 *x 10 ^{3} psi*

## Thermal Properties

Maximum Temperature: Mechanical

1150 *°C* 2100 *°F*

Maximum Thermal Shock

340 *°C* 650 *°F*

Specific Heat Capacity

830 *J/kg-K* 0.2 *BTU/lb-°F*

Thermal Conductivity

1.6 *W/m-K* 0.9 *BTU/h-ft-°F*

Thermal Expansion

2.9 *µm/m-K*

## Other Material Properties

Density

2.0 *g/cm ^{3}* 130

*lb/ft*

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

4.7

Dielectric Strength (Breakdown Potential)

7.7 *kV/mm* 0.3 *V/mil*

Electrical Resistivity Order of Magnitude

9.5 *10 ^{x} Ω-m*

## Common Calculations

Stiffness to Weight: Axial

17 *points*

Stiffness to Weight: Bending

65 *points*

Strength to Weight: Axial

27 *points*

Strength to Weight: Bending

37 *points*

Thermal Diffusivity

0.93 *mm ^{2}/s*

Thermal Shock Resistance

78 *points*

## Followup Questions

## Further Reading

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