Zirconia Ceramic
Zirconia ceramics offer higher strength and toughness than alumina ceramics, making them more suitable for high-load applications and environments with rapid temperature fluctuations.
They are widely used in impact-resistant, wear-resistant, and high-temperature operating conditions.
Physical Properties
| Property | Value range | Unit | Remarks |
|---|---|---|---|
| Density | 5.6-6.1 | g/cm³ | Varies with formulation and microstructure |
| Melting point | 2700-2900 | ℃ | High melting point provides excellent high-temperature resistance |
| Thermal expansion coefficient | 10-12 | ×10-6/℃ | Dimensional change rate with temperature variation |
| Thermal conductivity | 2.0-3.0 | W/m·K | Relatively low, suitable for thermal insulation applications |
| Heat conductivity | 2.1-3.0 | W/m·K | Good stability at elevated temperatures |
| Electrical conductivity | 10-12-10-9 | S/m | Electrically insulating, suitable for insulation applications |
Mechanical Properties
| Property | Value range | Unit | Remarks |
|---|---|---|---|
| Hardness (Vickers) | 1200-1500 | HV | High hardness suitable for wear-resistant applications |
| Flexural strength | 800-1200 | MPa | High flexural strength ensures good mechanical performance |
| Fracture toughness | 8-10 | MPa·m¹/² | Excellent toughness maintains integrity under high impact |
| Compressive strength | 2000-2500 | MPa | Suitable for high-pressure applications |
| Elastic modulus | 200-220 | GPa | High modulus contributes to structural rigidity |
| Fatigue strength | 300-500 | MPa | Excellent fatigue resistance for long-term durability |
Note: These properties depend on the specific zirconia phase (e.g., monoclinic, tetragonal) and the manufacturing process.
Applications of Zirconia Ceramics
Zirconia ceramics are widely used across multiple industries due to their outstanding physical and mechanical properties.
- Cutting tools and wear parts
- Nozzles and spray tubes
Protective components for abrasive conveying pipelines and equipment
Components operating under high temperatures, such as nozzles, furnace linings, and heat exchangers
Mechanical seals, bearings, and pump components used in high-pressure and high-temperature environments