The most common electrical connections are solder joints. Solder can also be used to install various sensors to improve thermal heat sinking. Common solders are indium solder and 90/10 Pb/Sn. Indium solder is used for various applications including sensor installation to provide excellent thermal contact with the sample. 90/10 Pb/Sn solder is used for applications requiring a higher temperature (liquidus point of 575 K and solidus point 458 K). Ostalloy® 158 solder is used as a seal for demountable vacuum cans and electric feedthroughs in cryogenic systems. Solder product overview...

Indium foil/solder

  • Foil form
  • Exceptional pressure seal
  • Extremely malleable
  • 99.99% pure
  • Acts as a metallic seal against corrosion
  • Flexible sensor mouting material for low stress at cryogenic temperatures

Note: Indium foil becomes a superconductor at 3.37 K (-270 °C), below which the thermal conductivity decreases.

High temperature solder

  • 90% Pb, 10% Sn
  • Good for connecting hardware
  • Solidifies quickly

Ostalloy® 158 solder

  • Does not shrink, but exhibits expansion upon solidification
  • Low melting temperature 343 K (70 °C), requiring only a simple melting pot and a gas or electric heat source
  • Reusable many times
  • Oxide separated easily in hot water
  • Solidifies quickly
  • Creates almost no dross because of its low melting temperature

Solder sleeves

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