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Zirconia Toughened Alumina


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Compared to alumina ceramics, ZTA products offer higher wear resistance, flexibility, chemical stability, and corrosion resistance. ZTA products are highly suitable for use in harsher environments due to their high temperature resistance, hardness, insulation properties, wear resistance, crack resistance, and high pressure tolerance. We can manufacture and process various precision ceramic structural components according to customer requirements.


ZTA ,Zirconia toughened Alumina  properties and performance:

Properties (ZTA-20) Value
Crystal Size (Average) 3 µm
Water Absorption 0.00%
Density 4.3g/cc
Hardness 14.4 (1470)
Fracture Toughness 4.80 MPa-m½
Flexural Strength (MOR) (3 point) @ RT 600 Mpa
Tensile Strength at break 380 mpa
Compressive Strength 2800 Mp
Elastic Modulus 300 Gpa
Poisson's Ratio 0.23
CTE 7.2  µm/m-°C (@ 25-200°C)
7.8  µm/m-°C (@ 25-600°C)
8.20 µm/m-°C (@ 25-800°C)
Thermal Conductivity @ RT 28W/m K
Max Use Temp 1650 °C
Dielectric Strength 50 V/mm
Dielectric Constant 12.2 (@ 1 MHz)
9.1(@ 1GHz)
Dielectric Loss 0.0006 (@ 1 MHz)
0.0005 (@ 1GHz)
Volume Resistivity 8.80e+15 ohm-cm (20°C)
1.40e+13 ohm-cm (100 °C)
5.30e+7 ohm-cm (600°C)
Specific Heat Capacity 0.800 J/g-°C ( 20.0 - 100 °C)
Thermal Shock Resistance R1 (K) 130
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