Zirconia Ceramic Thermal Insulation Block Product Introduction
Zirconia ceramic thermal insulation blocks are high-performance ceramic materials primarily composed of zirconium dioxide (ZrO₂), typically white at room temperature, and containing trace amounts of hafnium dioxide (HfO₂) and the stabilizer yttrium oxide (Y₂O₃). This material possesses the following core characteristics:
1. High melting point: Reaching 2715℃, suitable for high-temperature applications.
2. High hardness: Vickers hardness of 1250 HV, exhibiting excellent wear resistance.
3. Insulation performance: Resistivity greater than 10⁴ Ω·cm at room temperature, making it an excellent insulator.
4. Low thermal conductivity: Thermal conductivity between 0.23-0.35 W/(m·K), providing significant thermal insulation.
5. Chemical stability: Resistant to strong acids, strong bases, and inorganic/organic salt corrosion.
Product Features
1. High Temperature Resistance: Maintains structural stability without expansion caused by temperature differences at 1000-1200℃.
2. Thermal Insulation: Low thermal conductivity effectively reduces heat loss and improves energy efficiency.
3. Chemical Inertness: Resistant to corrosion from various chemicals, suitable for harsh environments such as strong acids and bases.
4. Electrical Insulation Properties: High resistivity prevents arc damage, suitable for electrical equipment insulation applications.
5. Self-Lubricating Function: Requires no additional lubricating medium in a vacuum environment, solving pollution problems.
6. High Mechanical Strength: Excellent impact resistance and wear resistance, resulting in a long service life.
Application Fields
1. Industrial High-Temperature Equipment:
Furnace linings, heat exchanger components.
Wear-resistant parts such as bearings, valves, and pump bodies.
Corrosion-resistant linings for chemical equipment.
2. Electronics and Energy:
Core materials for oxygen sensors.
Solid oxide fuel cell electrolytes.
High-voltage insulation rings, spark plugs.
3. Aerospace:
Engine thermal barrier coatings.
High-temperature protective components for spacecraft.
4. Medical Field:
Dental restorations (crowns, implants).
Orthopedic implants such as artificial joints.
Technical Parameters
Parameter Category | Specific indicators | Remark |
Physical properties | Purity: 99.9% | High purity ensures stable performance. |
Density: 6.0 g/cm³ | ||
Mechanical properties | Vickers hardness: 1250 HV | The wear resistance is 15 times that of alumina ceramics. |
Flexural strength: High | ||
Thermal properties | Maximum operating temperature: 1000-1200℃ | Effectively prevents heat transfer. |
Thermal conductivity: 0.23-0.35 W/(m·K) | ||
Electrical properties | Room temperature resistivity: >104 Ω·cm | Insulating at low temperatures, conductive at high temperatures. |
Resistivity at 1700℃: 6-7 Ω·cm |
Supports custom specifications.
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