Platinum-Iridium capillary
Overview
The Pt-Ir capillary is a high-precision micro-tube made of a platinum-iridium alloy. It combines the chemical stability of platinum with the high strength of iridium, making it the preferred precious metal tube for extreme working conditions.
Main grades
PtIr5, PtIr10, PtIr15, PtIr20, PtIr25
Key features (unreplacable)
(1)Superior corrosion resistance
Resistant to aqua regia, strong acids, strong bases, and organic solvents; Iridium ≥ 30% can withstand boiling aqua regia.
(2)High melting point and thermal stability
Melting point is approximately 1770–1850℃, does not deform or soften at high temperatures.
(3)High hardness and strength
Several times harder than pure platinum, resistant to deformation and wear, suitable for micro and precise structures.
(4)Extremely high dimensional accuracy
Outer diameter 0.3–8.0mm, wall thickness 0.015–0.5mm, tolerance can reach ±0.005mm.
(5)Excellent electrical conductivity / heat conductivity
Low contact resistance, electrochemical stability, suitable for electrodes and sensing scenarios.
(6)Biocompatible + X-ray non-permeable
Safe for medical implants, visible under imaging, facilitating interventional operations.
Typical Sizes (Customizable)
OD: 0.3 – 8.0mm
ID: 0.1 – 7.0mm (depending on wall thickness)
WT: 0.01 – 0.5mm
Length: Standard 500mm, customizable cutting.
Main applications
Main applications
(1)Analytical instruments
Gas chromatography columns, microfluidic chips, electrochemical sensors, micro pipettes (100–200 μL sample dispensing tubes).
(2)Medical intervention
Cardiac electrophysiological catheter electrodes, nerve stimulation electrodes, vascular marking rings, radiofrequency ablation devices.
(3)Precision electronics
Microelectronic electrodes, thick film resistors, high-temperature thermocouples (such as PtIr10/AuPt40 pairs).
(4)Chemical and energy industries
High-temperature reaction tubes, corrosive fluid transportation, catalytic carriers, fuel cell components.
(5)Aerospace
Extreme environment electrical contacts, miniature sensors, high-temperature fluid control components.
Selection suggestions
(1)High corrosion + Medium temperature: Choose PtIr10 (high cost-effectiveness).
(2)High temperature + High mechanical load: Choose PtIr20–PtIr25.
(3)Medical implant: Prefer PtIr10 (biocompatible + X-rays cannot penetrate)
