Presentation Information
[WBP2-09]Rapid and Scalable Fabrication of Alkali Metal-Intercalated C60 Bulk Superconductors
*Akira Iyo1, Hiroshi Fujihisa1, Yoshito Gotoh1, Shigeyuki Ishida1, Hiroshi Eisaki1, Hiraku Ogino1, Kenji Kawashima2,1 (1. National Institute of Advanced Industrial Science and Technology (AIST) (Japan), 2. IMRA JAPAN Co., Ltd. (Japan))
Keywords:
Alkali metal-intercalated C60,A3C60 (A = K,Rb,Cs),bulk superconductor,rapid and scalable synthesis
Alkali-metal intercalated fullerenes, A3C60 (A = K, Rb, Cs), exhibit promising superconducting properties, including a relatively high critical temperature (Tc = 30 K),a high upper critical field (Hc2 = 900 kOe), and isotropic superconductivity.
These features make them highly attractive for practical applications. However, conventional synthesis methods such as vapor-phase or solution-based techniques are often complex and time-consuming, posing significant challenges to large-scale production. The absence of an efficient and scalable synthesis route remains a major obstacle to the practical utilization of A3C60 superconductors.In this study, we report a newly developed synthesis method that enables the rapid and scalable fabrication of A3C60.
Stoichiometric amounts of Rb metal and C60 powder were directly mixed in an inert atmosphere using a mortar. The mixture was then pressed into pellets, wrapped in aluminum foil, and heat-treated at 200-400C for 1 hour using an electric furnace placed inside a glovebox. The sintered pellets exhibited a sharp superconducting transition and a large shielding volume fraction. This direct-mixing approach provides a simple, rapid, and scalable method for producing high-quality A3C60. The technique holds strong potential for applications in bulk superconducting magnets and wires.
These features make them highly attractive for practical applications. However, conventional synthesis methods such as vapor-phase or solution-based techniques are often complex and time-consuming, posing significant challenges to large-scale production. The absence of an efficient and scalable synthesis route remains a major obstacle to the practical utilization of A3C60 superconductors.In this study, we report a newly developed synthesis method that enables the rapid and scalable fabrication of A3C60.
Stoichiometric amounts of Rb metal and C60 powder were directly mixed in an inert atmosphere using a mortar. The mixture was then pressed into pellets, wrapped in aluminum foil, and heat-treated at 200-400C for 1 hour using an electric furnace placed inside a glovebox. The sintered pellets exhibited a sharp superconducting transition and a large shielding volume fraction. This direct-mixing approach provides a simple, rapid, and scalable method for producing high-quality A3C60. The technique holds strong potential for applications in bulk superconducting magnets and wires.