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GA Zirconia toughend alumina（ZTA）
Introduction to ZTA (Zirconia Toughened Alumina): Properties, Benefits, Types, and Applications
ZTA (Zirconia Toughened Alumina) is a ceramic material primarily composed of alumina, with 10% or 20% zirconia added and sintered. Compared to pure alumina ceramics, ZTA offers approximately twice the strength and stiffness. When compared to zirconia ceramics, ZTA has a lower thermal expansion coefficient, higher thermal conductivity, and better resistance to thermal shock. By combining the strengths of both alumina and zirconia, ZTA stands out as a high-performance ceramic material.
Key Advantages of ZTA Ceramics
- Balances performance characteristics between alumina and zirconia ceramics.
- Costs significantly less than zirconia ceramics while being slightly more expensive than alumina ceramics, making it a cost-effective choice.
Typical Applications of ZTA
- Artificial joints
- Pump components
- Grinding media
ZTA (Zirconia Toughened Alumina) property chart
| General | ||
| property | Unit | ZTA |
| Colour | white | |
| Density | g/cm³ | 4.3 |
| Water Absorption | % | 0 |
| Gas Permeability | atms-cc/sec | gas tight <10-10 |
| Mechanical Properties | ||
| Propertiy | Unit | ZTA |
| Vickers Hardness (500 gm) | GPa (kg/mm2 ) | 14.3 (1470) |
| Rockwell Hardness | R45N | 81 |
| Compressive Strength @ RT | MPa (psi x 103) | 2757 (400) |
| Flexural Strength (MOR) (3 point) @ RT |
MPa (psi x 103) | 621 (90) |
| Fracture Toughness (Notched Beam) | MPam1/2 | 6 |
| Modulus of Elasticity | GPa (psi x 106) | 339 (48) |
| Poissons Ratio | 0.23 | |
| Tensile Modulus @ RT | MPa (psi x 103) | 350 (51) |
| Thermal Properties | ||
| Property | Unit | ZTA |
| Thermal Conductivity @ RT | W/m-K | 24 |
| Specific Heat Capacity | J/g-°C | 0.800 |
| C.T.E. 25 – 100°C | x 10-6/C | 6.0 |
| C.T.E. 25°-300°C | x 10-6/C | 7.0 |
| C.T.E. 25°-600°C | x 10-6/C | 7.1 |
| Max.Service Temp.Air/Inert | Fahrenheit (°F) | 2584 |
| Celsius (°C) | 1400 | |
| Electrical Properties | ||
| Property | Unit | ZTA |
| Dielectric Constant @ 1 MHz | 12.5 | |
| Dielectric Constant @ Gigahertz | 9.4 | |
| Dielectric Loss @ 1 MHz | 0.0005 | |
| Dielectric Loss @ Gigahertz | 9.4 | |
| Dielectric Strength (.125” Thick) | V/mil | 250 |
| Volume Resistivity @ 25°C | ohms-cm | > 1 x 10¹⁴ |
| Volume Resistivity @ 300°C | ohms-cm | 1 x 10¹º |
| Volume Resistivity @ 500°C | ohms-cm | 2 x 10⁹ |
| Volume Resistivity @ 700°C | ohms-cm | 4 x 10⁸ |
*The values represent typical material properties and may vary depending on product configuration and the manufacturing process,
For further information, do not hesitate to contact us.
Our ZTA Ceramic Services: Your Trusted Supplier and Manufacturer
We are a direct supplier and manufacturer of ZTA ceramics, offering a wide range of products including ZTA ceramic nozzles, ZTA ceramic rods, and ZTA ceramic tubes. Additionally, we provide custom ZTA ceramic components tailored to your specific needs. If you are interested in high-performance technical ceramic solutions, feel free to contact us today!
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