Menu (ESC)

ESD-Safe Alumina

ESD alumina is a grade of alumina. The graph bars on the material properties cards below compare ESD alumina 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

2020 MPa 290 x 103 psi

Elastic (Young's, Tensile) Modulus

370 GPa 54 x 106 psi

Flexural Strength

300 MPa 44 x 103 psi

Fracture Toughness

4.0 MPa-m1/2 3.6 x 103 psi-in1/2

Poisson's Ratio


Thermal Properties

Maximum Temperature: Mechanical

650 °C 1200 °F

Maximum Thermal Shock

200 °C 390 °F

Melting Onset (Solidus)

2040 °C 3700 °F

Thermal Conductivity

25 W/m-K 14 BTU/h-ft-°F

Thermal Expansion

8.0 µm/m-K

Other Material Properties


3.9 g/cm3 240 lb/ft3

Dielectric Constant (Relative Permittivity) At 1 MHz


Electrical Dissipation At 1 MHz


Electrical Resistivity Order of Magnitude

6.2 10x Ω-m

Common Calculations

Stiffness to Weight: Axial

53 points

Stiffness to Weight: Bending

62 points

Strength to Weight: Axial

14 to 23 points

Strength to Weight: Bending

19 to 28 points

Thermal Diffusivity

3.7 to 10 mm2/s

Thermal Shock Resistance

4.9 to 14 points

Followup Questions

Further Reading

Ceramic and Glass Materials: Structure, Properties and Processing, James F. Shackelford and Robert H. Doremus (editors), 2008

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