Several very low melting point Indalloy® alloys are liquid at room temperature. These gallium-based alloys are finding increased use in various applications as a replacement for toxic mercury, which has a high vapor pressure at room temperature. These alloys have reduced toxicity and lower vapor pressure than mercury.
Excellent Thermal and Electrical Conductivity
Alloy systems that are liquid at room temperature have a high degree of thermal conductivity far superior to ordinary nonmetallic liquids. This results in the use of these materials for specific heat conducting and/or dissipation applications. Other advantages of these liquid alloy systems are their inherent high densities and electrical conductivities.
Extraordinary Wetting Ability to Both Metallic and Non-Metallic Surfaces
These alloys will wet most metallic surfaces once oxides have been sufficiently removed from the substrate surface. However, gallium is very reactive with some metals, even at room temperature. At high temperatures, gallium dissolves most metals, although a number, including Na, K, Au, Mg, Pb, Ni and interestingly Hg, are only slightly soluble at moderate temperatures.1
Gallium and the gallium alloys, like indium, have the ability to wet to many non-metallic surfaces such as glass and quartz. Gently rubbing the gallium alloy into the surface may help induce wetting.
Note: These alloys form a thin dull looking oxide skin that is easily dispersed with mild agitation. The oxide-free surfaces are bright and lustrous.
Typical applications for these materials include thermostats, switches, barometers, heat transfer systems, and thermal cooling and heating designs. Uniquely, they can be used to conduct heat and/or electricity between non-metallic and metallic surfaces.
Alloys are packaged in polyethylene bottles and shipped in accordance with applicable federal regulations.
Unopened bottles have a guaranteed one year shelf life. It is recommended that, as the alloy is removed from the bottle, the volume be replaced with dry argon. This will minimize the possibility of oxidation at the surface of the alloy. If the alloy has been stored below its melting point and has solidified, it should be re-melted and thoroughly shaken or mixed before use. Care should be taken in reheating the alloy in the original packaging provided. Temperatures should not exceed 65.6°C.
1. K. Wade and A.J. Banister, "The Chemistry of ALUMINUM, GALLIUM, INDIUM, and THALLIUM", Pergamon Texts in Inorganic Chemistry, Vol. 12, 1975.
Liquid Metal Technical Documents
No whitepapers to display
No application notes to display
Safety Data Sheets
Thermal Interface Materials Blog Posts
Recently I heard about two of my friends (and co-workers) taking on an additional responsibility in the electronics industry. Tim Jensen (Senior Product Manager for Engineered Solder Materials) and Maria Durham (Technical Support Engineer for Semiconductor and Advanced Assembly Materials) have become…
Most people think of our alloys only in the ‘soldering’ sense. However, these same materials may be used in applications where they aren’t designed to melt and attach components. Four common uses for solder alloys that are not soldering applications are: Fusible plugs or links (these…
Today’s technology simplifies the translation of an idea into a design. A drawing can be dimensioned in an instant. Thermal models and strength of materials calculations predict the reliability of a solder joint before a single part is made. However, before we get to that point we must…
Senior Product Manager, Engineered Solders
From One Engineer to Another®
All of Indium Corporation’s products and solutions are designed to be commercially available
unless specifically stated otherwise.