Crystallization temperature dependence of phase evolution and energy storage feature of KSr2Nb5O15 based glass ceramics.

Dense niobate glass ceramics with a principal crystalline phase of KSr₂Nb₅O₁₅ were obtained via melt-quenching and controlled crystallization technique. The research results reveal that with the crystallization temperature increasing from 800 to 950 °C, the dielectric constant and crystal phase content raise simultaneously. The achieved recoverable energy density (W_rec) displays a continuous increase from 0.61 to 1.23 J/cm³ (@500 kV/cm) with the increment of crystallization temperature from 800 to 950 °C. The glass ceramic obtained at 850 °C exhibits the supreme discharge energy density of 1.82 J/cm³ (@ 700 kV/cm), power density of 192.8 MW/cm³ and energy efficiency of 82%. These findings show that the acquired glass ceramics have potential applications in energy storage fields. [ABSTRACT FROM AUTHOR]