Effect of BaF2 addition on crystallization kinetics and electrical properties of BaO–SrO–Nb2O5–B2O3–SiO2 glass–ceramics

Abstract Glass-ceramic materials of the SrO–BaO–Nb 2 O 5 –B 2 O 3 –SiO 2 system added with various amounts of BaF 2 have been prepared by conventional melting and heat treated crystallization method. The effect of BaF 2 addition on crystallization kinetics has been explored for dielectric applications. The addition of BaF 2 to the glass–ceramics decreases the activation energy of crystallization and enhances the dielectric constant as well as breakdown strength remarkably. Glass-ceramic with a dielectric constant of 63.4, breakdown strength of 1120 kV/mm and energy storage density of 3.52 J/cm 3 could be achieved. A new electrode structure could effectively improve the electrical properties, and energy storage density could be increased from 3.52 J/cm 3 to 4.82 J/cm 3 , which is promising in high energy storage density dielectrics.