![]() ![]() In fact the composite’s thermal conductivity exceeded that of commercially available thermal paste by over 50 percent. Meanwhile, incorporating diamond particles into the material resulted in a composite with a greater thermal conductivity, or ability to conduct heat. These materials could then be used to protect electronics from electromagnetic interference. Applying a Ga/rG-O coating increased the shielding efficiency of materials like film and paper to over 70 dB-making them also more capable of absorbing electromagnetic radiation. Reduced graphene oxide (rG-O) and diamond, in particular, displayed excellent properties when incorporated in liquid gallium. The researchers used four different materials as fillers in their study: graphene oxide, silicon carbide, diamond and graphite. “We learned that particles of a large enough size have to be used otherwise mixing cannot occur and a composite cannot be formed,” explained co-corresponding author Dr. By incorporating filler particles, the liquid gallium also takes a paste or putty-like form, enabling easier handling. ![]() To overcome this limitation, a team from the Institute for Basic Science (IBS) and Ulsan National Institute of Science and Technology (UNIST) invented a new method to create usable composites of gallium with desirable properties. This makes gallium difficult to handle, shape or process, limiting its potential for widespread use beyond electronics. However, both pure gallium and gallium mixtures or alloy have high surface tension, restricting their ability to spread throughout surfaces. Just like mercury, gallium is a liquid at temperatures above 30☌. As gallium and its alloys are excellent conductors of heat and electricity, it comes as no surprise that up to 98 percent of commercial demand for gallium comes from the semiconductor and electronics industry. In 2014, a trio of researchers from Japan won the Nobel Prize in Physics for inventing the blue light-emitting diode-of which a key ingredient is gallium nitride. The various gallium composites and the mechanism behind their formation are described in Science Advances.Ī soft, silvery metal typically found in semiconductors and transistors, gallium (Ga) has proven indispensable for the development of modern electronics. 20, 2021) – A research team from South Korea has invented a new method of creating usable composites of liquid gallium metal.
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