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Zirconium oxide, also known as zirconia, belongs to the group of oxide ceramics and the "king" of oxide ceramics, unlike other ceramic materials, zirconium oxide is a material with a high wear-resistance, extremely smooth surfaces, low thermal conductivity and a high fracture toughness comparable with the metals. Very low and stable thermal conductivity is the outstanding property for zirconium oxide compared to the other oxide ceramics. Should be known that the parts made from zirconia are significantly more expensive than ones made of alumina ceramics.
Zirconia ceramics are used as tools for wire forming, auxiliaries in welding processes, materials for crowns and bridges in the dental industry, insulating rings in thermal processes, and oxygen measurement cells in lambda probes.
Zirconium oxide obtains its outstanding properties through the addition of stabilizers, such as magnesium oxide or yttrium oxide.
| Properties | Units | Zirconia |
| Physical | ||
| Density | g/cm3 | 6.05 |
| Crystal Structure | tetragonal | |
| Water Absorption | % @R.T. | 0 |
| Hardness | knoop (kg/mm2) | 1300 |
| Hardness | R45N | 81 |
| Mechanical | ||
| Compressive Strength | MPa @ R.T. | 2500 |
| Tensile Strength | MPa @ R.T. | 248 |
| Modulus of Elasticity | Gpa | 207 |
| Flexural Strength (MOR) | MPa @ R.T. | 1240 |
| Poisson's Ratio, u | 0.32 | |
| Fracture Toughness, KIc | MPa x m1/2 | 13 |
| Thermal | ||
| Max. Use Temperature | oC | 1000 |
| Thermal Shock Resistance | DT (oC) | 350 |
| Thermal Conductivity | W/m-K @ R.T. | 2.7 |
| Thermal Expansion Coefficient | mm/m-ºC | 11 |
| Specific Heat | cal/g-oC @ R.T. | 0.1 |
| Electrical | ||
| Dielectric Constant | 1MHz @ R.T. | 26 @100kHz |
| Dielectric Strength | kV/mm | 9 |
| Electrical Resistivity | Wcm @ R.T. | >10^13 |
Q: Are you a factory or trading company?
A: We are a manufacturer. Warmly welcome to visit our factory.
Q: What kinds of products can you make?
A: We are offering products made by 95%/99.5%/99.7% alumina, zirconia and steatite.
Q: Is it available to provide customized products?
A: 90% of our products are custom-made, so your special demands are always welcome.
Q: How soon can I get the price?
A: Nornally, we quote within 24 hours after your full inquiry arrives.
The full inquiry should include a drawing with technology requirements and your purchase quantity.
If you can inform us what is the part used in, that will help to make our quotation more accurate.
Q: How long is your delivery time?
A: Generally it will 21-35 days, but it varies on the different designs and quantities.
Q: Can you provide the free samples?
A: Yes, we would like to offer samples or similar ones for free, but the courier fee be collected.
Q: What is your terms of payment?
A: For the first order, we ask 100% T/T in advance and the balance before shippment.
