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Zirconia Toughened Alumina (ZTA)

Zirconia toughened alumina (ZTA) has mechanical strength and wear resistance and can be used as an ideal material between zirconia particles and alumina. It was established that ZTA ceramic material is stronger and tougher than regular alumina ceramics.

Typically, ZTA contains 10-20% volume of ZrO2 in alumina. Depending on the percentage of content, the properties of the ceramic can be tailored to suit the application in question. Because of the high price of pure zirconia, ZTA with good toughness is a good choice.

Read more: What is Zirconia Toughened Alumina?

Zirconia Toughened Alumina Properties:

  • High mechanical strength
  • High thermal resistance
  • Resistant to corrosion
  • Biocompatible



ZTA Ceramics Specification

Chemical Formula Zr-Al2O3
Density 4.1-4.38 g/cm^3
Hardness 1750-2100 Knoop
Elasticity 45-49 x 10^6 psi
Flexure Strength 100-145 ksi
Poisson's Ratio 0.26
Fracture Toughness 5-7 MPa m^1/2
Coefficient of Thermal Expansion 8.0-8.1 x 10^-6 1/C
Thermal Conductivity 20.0-21.0 W/mK
Shock Resistance 325 °C
Maximum Working Temperature 1650 °C

ZTA Ceramics Applications

Where high strength and erosion resistance material is needed, ZTA ceramics can become a first choice. Industrial components such as valves seals, sleeves, pump pistons and spraying nozzles are perfectly suit for ZTA.

ZTA also has high demand in the manufacturing industries. The properties such as high hardness, high wear resistance, chemical inertness at room temperature, high hot hardness, rapture strength, moderate heat resistance and compressive strength make its application superior than other cutting tool materials.

Other Applications:

ACM Ceramic Product Video

Your ZTA Ceramics Supplier

Advanced Ceramic Materials is a leading supplier of zirconia toughened alumina ceramic products of the highest quality for a wide range of applications. We are happy to provide advice on materials, design, and application. Feel free to contact us with any questions about ZTA or other ceramic materials that are not listed on the website.


Q: How Is ZTA Made?
A: ZTA is typically produced by mixing alumina and zirconia powders together, forming the mixture into the desired shape, and then sintering the material at high temperatures to achieve a fully dense structure.
Q: How Does Zta Compare to Other Ceramic Materials?
A: ZTA has better toughness and resistance to cracking than pure alumina, but it is not as tough as pure zirconia. ZTA also has a lower thermal expansion coefficient than zirconia, making it more suitable for high-temperature applications.
Q: What Are Some of The Factors that Affect the Properties of ZTA?
A: The properties of ZTA are affected by factors such as the particle size and distribution of the alumina and zirconia powders, the sintering temperature and time, the presence of any additives or impurities, and the microstructure of the final material.
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