A general approach to composites containing nonmetallic fillers and liquid gallium
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- A general approach to composites containing nonmetallic fillers and liquid gallium
- Wang, Chunhui; Gong, Yan; Cunning, Benjamin, V; Lee, Seunghwan; Le, Quan; Joshi, Shalik R.; Buyukcakir, Onur; Zhang, Hanyang; Seong, Won Kyung; Huang, Ming; Wang, Meihui; Lee, Jaeseon; Kim, Gun-Ho; Ruoff, Rodney S.
- Issue Date
- American Association for the Advancement of Science
- SCIENCE ADVANCES, v.7, no.1, pp.eabe3767
- We report a versatile method to make liquid metal composites by vigorously mixing gallium (Ga) with non-metallic particles of graphene oxide (G-O), graphite, diamond, and silicon carbide that display either paste or putty-like behavior depending on the volume fraction. Unlike Ga, the putty-like mixtures can be kneaded and rolled on any surface without leaving residue. By changing temperature, these materials can be stiffened, softened, and, for the G-O-containing composite, even made porous. The gallium putty (GalP) containing reduced G-O (rG-O) has excellent electromagnetic interference shielding effectiveness. GalP with diamond filler has excellent thermal conductivity and heat transfer superior to a commercial liquid metal-based thermal paste. Composites can also be formed from eutectic alloys of Ga including Ga-In (EGaIn), Ga-Sn (EGaSn), and Ga-In-Sn (EGaInSn or Galinstan). The versatility of our approach allows a variety of fillers to be incorporated in liquid metals, potentially allowing filler-specific "fit for purpose" materials.
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