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Dense Forsterite (IEC 60672 Type C-250)

C-250 forsterite is a grade of forsterite. The graph bars on the material properties cards below compare C-250 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

Maximum Thermal Shock

90 °C 190 °F

Specific Heat Capacity

850 J/kg-K 0.2 BTU/lb-°F

Thermal Conductivity

3.5 W/m-K 2.0 BTU/h-ft-°F

Thermal Expansion

10 µm/m-K

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz


Dielectric Constant (Relative Permittivity) At 1 MHz


Dielectric Strength (Breakdown Potential)

7.9 kV/mm 0.31 V/mil

Electrical Dissipation At 1 Hz


Electrical Dissipation At 1 MHz


Electrical Resistivity Order of Magnitude

11 10x Ω-m

Other Material Properties


3.1 g/cm3 200 lb/ft3

Flexural Strength

160 MPa 23 x 103 psi

Common Calculations

Thermal Diffusivity

1.3 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