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Wollastonite is an oxide-based engineering ceramic. It has a very low thermal conductivity and a moderately low dielectric strength among oxide-based engineering ceramics. The graph bars on the material properties cards below compare wollastonite 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

Thermal Conductivity

0.8 W/m-K 0.46 BTU/h-ft-°F

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz


Dielectric Strength (Breakdown Potential)

6.0 kV/mm 0.23 V/mil

Other Material Properties

Compressive (Crushing) Strength

260 MPa 38 x 103 psi


2.8 g/cm3 170 lb/ft3

Flexural Strength

100 MPa 15 x 103 psi

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