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Elements of Indium by Indium Corporation: Liquid Gallium-Indium

Apr 15, 2021

Liquid metals can be mysterious to many people as they challenge the mental stereotypes we have about metal. In most cases, liquid metalsare too hot to handle due to the elevated temperature needed to transform the metal from a solid to a liquid. Gallium-indium alloys are unique—they remain liquid at room temperature, making them ideal for a number of emerging applications.

As technological advances place higher power densities in smaller packages, thermal reliability has become an issue of increasing importance. While the thermal conductivity properties of metals make them ideal for thermal interface materials (TIMs), their hardness can limit their effectiveness due to high interfacial resistance. A liquid alloy, meanwhile, delivers the high thermal conductivity of traditional metals while mitigating the interfacial resistance issues that exist with solids.

Liquid gallium-indium has already been successfully used as a thermal interface for computer hardware cooling, where it offers higher thermal conductivity compared to the traditionally-used thermal pastes and epoxies.

Because gallium-indium is nontoxic, it has also been used as an alternative to traditional liquid metals such as mercury in household thermometers and large mirror telescopes. Its non-reactivity compared to mercury and lithium also makes it a possible coolant for fusion reactors.

Indium Corporation is a global leader for indium metal and associated technologies.For more information on indium metal, visit www.indium.com/indium49.


Indium Corporation is a premier materials refiner, smelter, manufacturer, and supplier to the global electronics, semiconductor, thin-film, and thermal management markets. Products include solders and fluxes; brazes; thermal interface materials; sputtering targets; indium, gallium, germanium, and tin metals and inorganic compounds; and NanoFoil®. Founded in 1934, the company has global technical support and factories located in China, Germany, India, Malaysia, Singapore, South Korea, the United Kingdom, and the U.S.

For more information about Indium Corporation, visit www.indium.com or emailjhuang@indium.com. You can also follow our experts, From One Engineer To Another® (#FOETA), at www.linkedin.com/company/indium-corporation/ or @IndiumCorp.

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