Cordierite

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For over 60 years we have been a precision machining and polishing fabricator of parts from all technical ceramics, sapphire, glass and quartz. We machine these materials to very precise tolerances (many times measured in millionths of an inch) for dimension, flatness, wedge and roundness or cylindricity. Our customers typically have a critical application that requires extremely tight tolerances in ultra-hard materials. We also have the capability to grind and polish spherical radius parts in a variety of hard materials, both inside and outside diameters, to optical requirements.

Please feel free to navigate to other pages within our site to see more information on all of our high precision machining services, materials and capabilities. If you would like more information please click here to send a request, or visit our Frequently Asked Questions page.

PropertyValue
General
Chemical Formula

2MgO-2Al2O3-5SiO2

Mechanical
Density
2.5 gm/cc
Hardness

7 - 7.5 Mohs

Tensile Strength
3.5 - 5.5 kpsi
Modulus of Elasticity

12 x 106 psi

Flexural Strength
8 - 17 kpsi
Compressive Strength
30 - 51 kpsi
Electrical
Dielectric Strength
212 ac V/mil
Dielectric Constant
5 (@ 1 MHz)
Volume Resistivity

1011 ohm-cm

Thermal
Coefficient of Thermal Expansion

1.7 - 2.4 x 10-6/°C

Thermal Conductivity
3 W/mK
Maximum Working Temperature
500-1100 °C

All properties are at room temperature unless otherwise noted.

Engineering data are representative, and are not intended as absolute nor warrantable. Manufacturer’s Data shown is blended from multiple sources and therefore illustrates the marketplace.

*Click on a Property to see a comparison of up to 10 materials