Zirconium oxide ceramics also have very high thermal expansion and are therefore often the material of choice for joining ceramic and steel.
Components made from this material are more expensive than components made of alumina ceramics. Zirconium oxide ceramics are used among other applications, as tools for wire forming, as auxiliaries in welding processes, as materials for crowns and bridges in the dental industry, as insulating rings in thermal processes, and as oxygen measurement cells in lambda probes.
High density
Good corrosion resistance
High strength and fracture toughness
High hardness and wear resistance
High temperature resistance and Low thermal conductivity
Performance
Physical properties: high insulation resistance, breakdown, high temperature resistance, abrasion resistance, high strength (three meters altitude fall not broken)
Fire rating: USA military standard MIL-F-51058 (the highest level)
Typical application: strong current, voltage, strong high temperature parts, IC MOS, IGBT power tube heat pipe insulation
Certification: natural organic matter, the European Union, exempt products without certification materials
Thermal conductivity: high temperature: 1600 degrees below the ideal heat insulating material of high voltage and high frequency equipment.
Product Property :
| Properties Table | ||||||||
| Test Item / Unit | Numerical Value | Test Item / Unit | Numerical Value | |||||
| Product Material | Alumina | Zirconia | Product Material | Alumina | Zirconia | |||
| Component Content(%) | ≥99% | ≥95% | ≥90% | Volume Resistance(cm) | >1012 | >1012 | >1012 | |
| Sintering Temp(ºC) | 1780-1800 | 1650-1680 | 1550-2600 | Bending Strength(Mpa) | 400 | 320 | 1100 | |
| Specific Gravity(g/cm3) | ≥3.8 | ≥3.6 | ≥6 | Roughness(μm) | ≤0.8 | ≤0.8 | ≤0.8 | |
| Breakdown Voltage Strength(kv/mm) | 15 | 15 | 15 | Thermal Expansion Coefficient(*10°) | 6.8-8 | 6.2-8.5 | 6.9-10 | |
| Bibulous Rate(%) | <0.01 | <0.01 | <0.01 | Mirror Polished(Ra) | ≤0.05 | ≤0.1 | ≤0.05 | |
| Anti Pressure(Mpa) | 3700 | 2400 | 5000 | Thermal Conductivity(W/m-k) | 25 | 20 | 2.5 | |
| Hardness(Hra) | ≥88 | ≥82 | ≥88 | Temperature Resistance(ºC) | 1700 | 1600 | 1800 | |
Application
Alumina ceramic is mainly used in large power equipment, IC MOS tube, IGBT chip heat conducting insulation, high frequency power supply, communication, mechanical equipment, strong current, high voltage, high temperature and other
thermal heat insulation parts need products.
Physical properties: high thermal conductivity, high voltage insulation resistance, high temperature resistant, abrasion resistant, high strength.
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