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Alumina 99.9% - 100%


99.9% - 100% Al2O3 

Alumina 99.9-100% overview

Ultra-pure aluminas that exhibit strong inertness and extreme hardness. Applied in severe-service conditions requiring excellent strength, high operating temperatures, and ultra-pure composition. 

Example Applications

  • Plasma etch components
  • Nuclear grade insulator components


CoorsTek Formulations

Contact a CoorsTek expert to choose an Alumina 99.9% - 100% solution for your application.

Property Units Value

Flexural Strength, MOR (20 °C)


350 - 600

Fracture Toughness, KIc

MPa m1/2

4.0 - 5.0

Thermal Conductivity (20 °C)

W/m K

28 - 35

Coefficient of Thermal Expansion

1 x 10-6/°C

8.0 - 8.5

Maximum Use Temperature


1750 - 1800

Dielectric Strength (6.35mm)



Dielectric Loss (tan δ)

1MHz, 25 °C

10-4 to 10-3

Volume Resistivity (25°C)


1014 to > 1015

The information provided on this chart is for general material property reference only.  The customer should recognize that exact properties of materials may vary according to product configuration but close control of values of most properties can be maintained, if specified. Nothing herein is provided, or is to be construed, as absolute engineering data or constituting a warranty or representation. Contact CoorsTek for cost-effective design, development and manufacturing assistance. CoorsTek has 300+ variations including various forming and firing processes, not all variants are represented in the present website.

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