Zirconia Ceramics(ZrO2) materials are used in very high wear applications with very high pressure, possessing higher fracture toughness and stiffness than alumina. Zirconia is widely applied for its high strength, toughness, wear and thermal properties. It warrants its usage for longer life and reduce less time where alumina fails in this applications. During manufacture, the zirconia powder is combined with oxides such as yttria, magnesia or tetragonal. The material is almost partially stabilized or even it can be fully stabilized if required, the different composition allows different properties to be enhanced.
The main properties of Zirconia Ceramics are as below:
1. Use temperatures up to 850°C |
Unit | 95% Al2O3 | 99% Al2O3 | ZrO2 | GP-Si3N4 | |
Color | - | white | ivory | white | gray |
Density | g/cm³ | 3.65 | 3.88 | 5.95 | 3.22 |
Water Absorption | % | 0 | 0 | 0 | 0 |
Young's Modulus | Gpa | 280 | 350 | 205 | 295 |
Vickers Hardness | Gpa | 14 | 20 | 12 | 18-20 |
Flexural Strength ( at R.T. ) | Mpa | 280 | 300 | 900 | 650 |
Compressive Strength ( at R.T. ) | Mpa | 2000 | 2500 | 2200 | 2200 |
Thermal Conductivity ( at R.T. ) | W/(m.K) | 18-25 | 30 | 2.2 | 25 |
Thermal Shock Resistance | ΔT(°C) | 220 | 180-200 | 280-350 | 450-650 |
Max. Working Temperature ( at R.T. ) | °C | 1500 | 1700 | 850 | 1200 |
Volume Resistivity ( at R.T. ) | Ω.cm | >10^15 | >10^14 | >10^12 | >10^14 |
Dielectric Constant (1 MHz at R.T. ) | - | 9.50 | 9.80 | 26 | 8.20 |
Dielectric Strength | kV/mm | 16 | 22 | - | 16 |
- Wire forming/drawing dies | - Kiln furniture crucible |
- Insulating rings in thermal processes | - Fiber optic ferrules and sleeves |
- Precision shafts & axles in high wear environments | - Knives and blades |
- Furnace process tubes | - Bearings & rollers |
- Wear resistance pads | - Ceramic guiders |
- Thermocouple protection tubes | - Medical and surgical component |
- Sandblasting nozzles | - Mechanical seals |
- Extrusion dies | - Pumps, pistons, and liners Pumps, pistons, and liners |
- Bushings and caps | - Welding nozzles & pins |
As a professional company in advanced ceramic industries, UNIPRETEC is manufacturing and supplying high quality and high precision ceramic components for clients from worldwide. Our ceramic products are widely used in various fields of automotive, metallurgy, machinery, electronic & electrical, food, chemical, medical and so on. With experienced engineers and talented workers, we are able to evaluate projects and drawings properly, make valuable suggestion, supply satisfying products. Our materials including:
- Aluminium Oxide ( 95% 96% 99% 99.5% 99.7% Al2O3 )
Aiming at building long term cooperation relationship with our clients, we set our motto as "Quality First". Far now, our products have been exported to North Amirica, East Europe, West Europe, East Asia, Southeast Asia and get good reputation from our client. |
--- ZrO2 Ceramic Cutting Blades --- --- Ceramic Grinding Media --- --- Al2O3 Alumina Ceramic Parts ---