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Porous Forsterite (IEC 60672 Type C-240)

C-240 forsterite is a grade of forsterite. The graph bars on the material properties cards below compare C-240 forsterite 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

Specific Heat Capacity

850 J/kg-K 0.2 BTU/lb-°F

Thermal Conductivity

1.7 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


Dielectric Strength (Breakdown Potential)

7.9 kV/mm 0.31 V/mil

Electrical Dissipation At 1 MHz


Other Material Properties


2.1 g/cm3 130 lb/ft3

Flexural Strength

40 MPa 5.8 x 103 psi

Common Calculations

Thermal Diffusivity

0.94 mm2/s

Followup Questions

Further Reading

ASTM C242: Standard Terminology of Ceramic Whitewares and Related Products

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