Sodium-ion conductive glass-ceramics of Na₅FeSi₄O₁₂ were successfully synthesized through the crystallization of glasses with the composition Na₅FeSi₄O₁₂. The optimum crystallization conditions and the kinetics of the glasses were examined by differential thermal analysis. The characterization of crystallization and conduction properties were performed on thus obtained glass-ceramic Na₅FeSi₄O₁₂ by a non-isothermal modified Kissinger and complex impedance methods, respectively. The activation energy for crystallization was 279 kJ mol⁻¹ and the sodium-ion conductivity was obtained as 1.33 × 10⁻³ S cm⁻¹ at 300 °C. To improve the conductivity with a small amount of Si-substitutes, Na₅FeSi₄O₁₂-isostructural derivatives containing such as B, Al, and Ga were also prepared according to the same crystallization process of glasses with the composition Na_5.1FeM_0.1Si_3.9O₁₂ (M = B, Al, Ga). Without phase separation, the ionic conductivities of glass-ceramics were enhanced up to 1.69 × 10⁻³ at 300 °C on Na_5.1FeB_0.1Si_3.9O₁₂, whereas decreased down to 1.30 × 10⁻³ and 1.12 × 10⁻³ S cm⁻¹ at 300 °C on Na_5.1FeAl_0.1Si_3.9O₁₂, and Na_5.1FeGa_0.1Si_3.9O₁₂, respectively.

通过Na ₅ FeSi ₄ O ₁₂组成的玻璃的结晶，成功合成了Na ₅ FeSi ₄ O _12的钠离子导电玻璃陶瓷。通过差热分析检查了玻璃的最佳结晶条件和动力学。通过非等温改进的基辛格法和复阻抗法分别对由此获得的玻璃-陶瓷Na ₅ FeSi ₄ O ₁₂进行结晶和导电性能的表征。结晶的活化能为279 kJ mol ^-1在300℃下得到的钠离子传导率为1.33×10 ^-3 S cm ^-1。为了用少量的Si取代基提高导电性，还按照与玻璃相同的Na _5.1 FeM _0.1 Si组成的玻璃的结晶过程，制备了含有B，Al和Ga的Na ₅ FeSi ₄ O ₁₂异构结构衍生物。_3.9 O ₁₂（M = B，Al，Ga）。在没有相分离的情况下，在Na _5.1 FeB _0.1 Si _3.9 O ₁₂上于300°C时，玻璃陶瓷的离子电导率提高到1.69×10 ^-3。然而，在300℃下在Na _5.1 FeAl _0.1 Si _3.9 O ₁₂和Na _5.1 FeGa _0.1 Si _3.9 O _12上分别降至1.30×10 ^-3和1.12×10 ^-3 S cm ^-1。