Zirconia hardness close to natural diamond, lighter than metal, with no wear, do not change color and other gem characteristics, zirconia ceramics degree of insulation, no metal, electroplating pollution
Item | Unit | Zirconia ceramic | 99% alumina ceramic | 95% alumina ceramic | steatite ceramic | Mulite ceramic | cordierite ceramic |
Bulk density | g/cm3 | 6 | 3.8 | 3.6 | 2.8 | 2.2 | 2.3 |
Water absorption | % | 0 | 0 | 0 | 0 | 12 | 12 |
Thermal Conductivity | (W/m.k) | 10 | 19-30 | 14-24 | 2.3 | 2-6 | 1.3-1.8 |
Resistance to hermal shock. Minimum | TKε | 70 | 150 | 140 | 80 | 150 | 300 |
Withstand voltage, Minimum | KV | 15 | 20 | 18 | 20 | 25 | - |
Flexural strength | MPa | 1000 | 300 | 240 | 120 | 120 | 30 |
Sinterring temperature | ℃ | 1500 | 1670 | 1600 | 1250 | 1250 | 1250 |
Maximum working temperature | ℃ | 1200 | 1500 | 1200 | 800 | 1000 | 1000 |