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Alumina 85% - 93%


85% - 93% Al2O3 

Alumina 85-93% Overview

85-93% aluminas provide good wear and corrosion resistance in addition to being electrically resistive; making them great reliable, economic, general use technical ceramics.

Example Applications

  • Mill linings


CoorsTek Formulations

Contact a CoorsTek expert to choose an Alumina 85% - 93% solution for your application.

Property Units Value

Flexural Strength, MOR (20 °C)


250 - 365

Fracture Toughness, KIc

MPa m1/2

3.0 - 4.0

Thermal Conductivity (20 °C)

W/m K

12.6 - 24.0

Coefficient of Thermal Expansion

1 x 10-6/°C

7.2 - 8.5

Maximum Use Temperature


1250 - 1500

Dielectric Strength (6.35mm)


5.3 - 10.0

Dielectric Loss (tan δ)

1MHz, 25 °C

3.5 x 10-4 to 2.0 x 10-2

Volume Resistivity (25°C)


> 1014

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.