Zirconia Toughened Alumina (ZTA)

Edgetech Industries, Advanced Ceramics Division supplies high-quality and competitive price advanced Zirconia Toughened Alumina (ZTA).


Zirconia Toughened Alumina (ZTA)


Zirconia Toughened Alumina Ceramics (referred to as composite ceramics, ZTA) has the characteristics of corrosion resistance and chemical stability. Alumina has high hardness and the toughness of zirconia is good. The composite ceramics have the properties of both materials, it has higher flexural strength and fracture toughness at room temperature, and zirconia toughened ceramics have excellent wear resistance, high strength, and hardness.

The performance of ZTA ceramics is better than that of 99 alumina ceramics, and the price is much lower than that of zirconia ceramics. The specific ratio of the two materials can be adjusted according to the application. 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.

Edgetech Industries is a specialist supplier of zirconia toughened alumina products (Available products: ZTA rods, tubes, disc, seal ring, sheet, plate, etc.) of the highest quality for a wide range of applications.


Zirconia Toughened Alumina Properties


Chemical FormulaZr-Al2O3
Density4.1-4.38 g/cm^3
Hardness1750-2100 Knoop
Elasticity45-49 x 10^6 psi
Flexure Strength100-145 ksi
Poisson’s Ratio0.26
Fracture Toughness5-7 MPa m^1/2
Coefficient of Thermal Expansion8.0-8.1 x 10^-6 1/C
Thermal Conductivity20.0-21.0 W/mK
Shock Resistance325 °C
Maximum Working Temperature1650 °C


Specifications of Zirconia Toughened Alumina 


Surface Roughnessμm0.2



Bending strength3-point methodMPa700
Modulus of ElasticityGPa310
Vickers HardnessGpa15
Fracture toughnessIF methodMPa∙m1/23.5
ThermalCoefficient of thermal expansion40-400℃106/K7.1
Thermal conductivity25℃W/(m∙K)27
Specific heat25℃J/(Kg∙K)720
ElectricalDielectric constant1mHZ10.2
Dielectric loss factor1MHZTanx10-40.2
Volume resistivity25℃Ω∙cm>1014
Breakdown strengthDCkV/mm>15


Zirconia Toughened Alumina Applications:


Where high strength and erosion-resistant material is needed, ZTA ceramics can become the first choice. Industrial components such as valve seals, sleeves, pump pistons, and spraying nozzles are perfectly suited for ZTA.


Other Applications:




-Probe Bodies


-Fluid Delivery System Components

-Pump Position Sleeves


-Sensor Bulbs


-Analytical instrument Columns


Packing of Zirconia Toughened Alumina Products


Our ZTA products are clearly tagged and labeled externally to ensure efficient identification and quality control. The products are separated by bubble bags for shockproof purposes and finally packed in wooden or carton boxes. Great care is taken to avoid any damage which might be caused during storage or transportation.


Related Products