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Formula: Fe 54/Ni 29/Co 17
Form: Insulated Wire
Material: Nickel/Iron/Cobalt - Glass Sealing Alloy (Kovar®)
Commodity: Alloys
Conductor Diameter:
0.03mm
Insulation:
Polyimide
Insulation Thickness:
0.0025mm
Polyimide-Insulated Glass Sealing Alloy Wire (Fe54/Ni29/Co17) integrates the mechanical resilience and high-temperature sealing capability of the alloy with the thermal stability and dielectric strength of polyimide insulation. The conductor’s specific alloy composition is optimized for matched expansion sealing with glass in electronic feedthroughs and hermetic connectors, ensuring long-term dimensional stability and vacuum integrity. The polyimide coating provides excellent abrasion resistance and electrical insulation even under extreme thermal cycling. Applications include aerospace hermetic connectors, high-reliability sensor leads, and glass-to-metal sealed electronics in defense systems. In research, it supports studies on alloy-glass interface behavior, thermal fatigue life of insulated feedthrough wires, and development of advanced hermetic sealing systems. This pairing of precision alloy performance with high-grade polymer insulation ensures durability and electrical reliability in the most demanding environments.
Health hazard/Hazardous to the ozone layer
Serious health hazard
Tolerances
Insulated Wire
| Conductor Diameter | ±10% | |
|---|---|---|
| Insulation Thickness | Nominal | |
| Length | +5% / -1% |
Material Properties for Alloys
Mechanical Properties
| Element | Value |
|---|---|
| Elongation at break( % ) | 30 |
| Modulus of elasticity( GPa ) | 207 |
| Tensile strength( MPa ) | 510-520 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 48.9 |
| Temperature coefficient( K⁻¹ ) | 0.0037 |
Magnetic Properties
| Element | Value |
|---|---|
| Curie temperature( C ) | 435 |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 1450 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 439@23°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 17.3@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 4.81@20-200°C |
Physical Properties
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 8.36-8.5 |
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