Indium Blog

Gallium-Indium Alloys for Mechanical Uses (Liquid at Room Temperature)

  • Gallium
  • Indium
  • Indium Alloy

  • In a previous post I mentioned some non-solder uses for low melting point alloys – meaning that they are used for purposes other than simply “joining two surfaces with a filler metal”. There is a second category of materials which do not mechanically join two surfaces – although they do provide electrical and thermal coupling. I’m talking about metal that is liquid at room temperature!

    Gallium-indium-based alloys are non-toxic and, unlike other metails which are liquid at room temperature, are not highly reactive. GaIn alloys can be used for the following liquid metal applications:

    • As a static thermal interface material for electronics components (ex. CPU processor cooling).
    • As a dynamic thermal interface material for heat exchangers (ex. nuclear reactors).
    • As a thermometer material
    • As a captive electrical conductor
    • In mirror fabrication

    I’m always interested in new liquid metal applications. If you have one in mind, let me know!

    You can reach me at

    All the best,


    Authored by previous Indium Application Manager Jim Hisert