Stabilizing High-Temperature α-LiPS by Rapidly Heating the Glass.

High-temperature metastable phases exhibit superior characteristics compared to those of thermodynamically stable phases at room temperature. Although optimization of the compositions and crystallizations from glasses contribute to the stabilization of metastable phases at room temperature, the stabilization of the high-temperature α-LiPS phase is not yet reported. α-LiPS was successfully stabilized at room temperature, instead of the middle-temperature β-LiPS phase, rapid heating to crystallize the LiPS glass.