Plunger Rod
Made from high-purity aluminum oxide (Al2O3) single crystal, the sapphire plunger rod undergoes oriented cutting and precision grinding to achieve a mirror-like surface finish and micron-level straightness. It enables precise, repeatable metering under high-pressure, high-frequency reciprocating conditions, with wear life significantly exceeding that of cemented carbide, making it a core motion component in precision microfluidic control.
Technical data
| Outside diameter: | 2.00–32.00 mm | Length: | 13.00–120.00 mm |
| Surfaceness: | Rz0.10 |
Features & Benefits
High Hardness and Wear Resistance
Mohs 9, with wear life longer than that of cemented carbide, helping to reduce equipment maintenance frequency and downtime costs.
Good Corrosion Resistance
Resistant to most acids, alkalis, and organic solvents, making it suitable for demanding media environments in fields such as biology, chemical engineering, and pharmaceuticals.
Precision Surface Polishing
Advanced precision polishing achieves a surface finish of Rz ≤0.10 μm, supporting microliter-level precision metering and helping ensure repeatability and consistency in liquid measurement.
Biocompatibility and Low Contamination Risk
The material offers strong chemical inertness and does not react with most samples, with a low risk of leaching. It is suitable for pharmaceutical analysis, in vitro diagnostics, and clean fluid systems.
Assembly-Level Delivery Capability
Drawing on accumulated expertise in precision fitting between sapphire and metal components, it addresses the fragility challenges of assembling hard and brittle materials, providing a one-stop solution from component machining to assembly.