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Formula: In 50/Sn 50
Form: Foil (Light Tight)
Material: Indium/Tin
Commodity: Alloys
Light Tight:
Light Tight
Indium Tin Alloy Foil Light Tight (In50/Sn50) offers the solderability and low melting point of an indium–tin eutectic alloy in a foil format engineered to block all external light transmissions. Designed to prevent even microscopic “pinhole” leaks, it provides complete optical shielding in sensitive environments. Industries such as photonics, aerospace, and high-vacuum engineering use this foil for optical housings, laser system gaskets, and light-sensitive detectors. Specific technologies include packaging of photodiodes, sealing of cryogenic optical devices, and protection of quantum sensor assemblies. Research explores its role in optical shielding studies, integration into photonic circuits, and optimization of light-tight seals under thermal cycling. The light-tight foil ensures reliable performance in both scientific instruments and industrial systems requiring flawless exclusion of external light. Its ability to unite soldering functionality with complete light-blocking capability makes it indispensable in advanced optical and electronic engineering.
Material Properties for Alloys
Mechanical Properties
| Element | Value |
|---|---|
| Elongation at break( % ) | 83 |
| Shear strength( MPa ) | 11 |
| Tensile strength( MPa ) | 12 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 15 |
| Temperature coefficient( K⁻¹ ) | - |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 125 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 34@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 20@20-100°C |
Physical Properties
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 7.3 |
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