Ultra Rapid Quenching Apparatus (URQA) is supported by NSF-MRI program. (NSF Award: DMR 1531755). The URQA consists of a crucible-free levitation melting and splat quenching system, which makes it well suited for melting reactive materials bearing high melting points. The synthesis of amorphous, microcrystalline and metastable phases are the result of high cooling rates of more than 106 K·s-1. A high-velocity two-piston system is driven by solenoids; when activated the fronting flat surface splat-quenched the falling liquid sample, forcing the exposed large surface area to cool and solidify at high cooling rates. Therefore, synchronizing dropping melt and pistons require strict control, which is achieved by means of a laser light barrier. Easily exchangeable copper pistons or other high conductivity metals are used. The compact high-vacuum chamber for operation is kept under ultra-clean operating conditions; alternative inert gas backfilling operating is available. The URQA strongly supports the non-equilibrium preparation of clathrates.

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