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Zirconia Toughened Alumina


ZrO2 Toughened Al2O3

zirconia toughened alumina overview

Zirconia toughened alumina (ZTA) is a specialized alumina designed for high thermal shock resistance and increased toughness.

Example Applications

  • Bushings
  • Wire bonding capillaries


CoorsTek Formulations

Contact a CoorsTek expert to discuss custom solutions manufactured from Zirconia Toughened Alumina.

Property Units Value

Flexural Strength, MOR (20 °C)


352 - 1250

Fracture Toughness, KIc

MPa m1/2

4.0 - 7.3

Thermal Conductivity (20 °C)

W/m K

12 - 27

Coefficient of Thermal Expansion

1 x 10-6/°C

8.0 - 9.0

Maximum Use Temperature



Dielectric Strength (6.35mm)



Dielectric Loss (tan δ)

1MHz, 25 °C

5 x 10-4

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.

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