Zirconium Oxide Balls (ZrO₂) for Valves, Pumps and Precision Mechanisms
REDHILL supplies zirconium oxide balls, also known as zirconia balls, for valves, pumps and precision mechanisms. They combine hardness with high strength and resistance to wear. As a result, they suit parts that face repeated contact and demanding fluid conditions.
Key Technical Specifications
The values below describe typical stabilized zirconia. However, the stabilizer, production method and test conditions affect the results.
- Density: Approximately 6.0 g/cm³
- Vickers Hardness: Approximately 12–13 GPa
- Flexural Strength: Approximately 1,000–1,250 MPa
- Compressive Strength: Approximately 2,000–2,500 MPa
- Elastic Modulus: Approximately 200–220 GPa
- Fracture Toughness: Approximately 5–10 MPa·m½
- Thermal Conductivity: Approximately 2–3 W/(m·K) at room temperature
- Thermal Expansion: Approximately 10–11 × 10⁻⁶/K
- Electrical Resistivity: Greater than 10¹² Ω·cm at room temperature
- Magnetic Properties: Non-magnetic
Also, confirm the operating temperature for the selected grade and complete assembly. The ceramic, fluid, load and other parts all affect this limit.
Benefits of Zirconium Oxide Balls
Zirconia resists wear and supports a smooth surface finish. In addition, its fracture toughness helps limit crack growth under mechanical stress.
Zirconia also offers electrical insulation at room temperature. However, electrical resistance decreases as temperature rises.
Temperature changes also affect fit and clearance. Therefore, match the ceramic grade and mating materials to the working conditions.
Applications of Zirconium Oxide Balls
For example, common applications include:
- Valves and Dosing Pumps: Check balls and sealing elements.
- Flow Meters and Instruments: Precision balls for fluid measurement.
- Special Bearings: Rolling elements for suitable loads and speeds.
- Grinding and Milling: Wear-resistant media for material processing.
However, chemical resistance depends on the fluid, concentration and temperature. Therefore, include these details when choosing the material.
Available Grades and Sizes
- Precision Grades: G5, G10, G25, G50 and G100
- Diameter Range: 0.5 mm–50 mm
Availability depends on the combination of diameter, material and precision grade. Finally, send us your size, grade, quantity and operating conditions so we can confirm suitable options.