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Zircon (Zirconium Silicate, ZrSiO4)

Zircon is an oxide-based engineering ceramic. It has a moderately high tensile strength and a moderately high density among oxide-based engineering ceramics. The graph bars on the material properties cards below compare zircon 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

1650 °C 3000 °F

Thermal Conductivity

3.5 W/m-K 2.0 BTU/h-ft-°F

Thermal Expansion

5.0 µm/m-K

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz


Dielectric Strength (Breakdown Potential)

7.9 kV/mm 0.31 V/mil

Other Material Properties


3.9 g/cm3 240 lb/ft3

Flexural Strength

450 MPa 65 x 103 psi

Tensile Strength: Ultimate (UTS)

290 MPa 42 x 103 psi

Common Calculations

Strength to Weight: Axial

21 points

Strength to Weight: Bending

25 points

Followup Questions

Further Reading

Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005