Improved discharged energy density for niobate-based B2O3 system glass–ceramics by CeO2 addition

Strontium barium niobate-based borate system glass–ceramics with CeO2 addition were prepared via a controlled crystallization method. And the structural, dielectric and ferroelectric properties were investigated. The results showed that the moderate addition of CeO2 optimized the microstructure and improved permittivity, breakdown strength and discharged energy density of the glass–ceramics. A maximum discharged energy density of 1.95J/cm3 was achieved in the glass–ceramics with 0.5mol% CeO2, which was improved by 2.1 times as compared with that of the pure glass ceramics (0.95J/cm3). •Niobate-based B2O3 system glass–ceramics were prepared by a conventional melting and subsequent crystallization method.•Addition of CeO2 optimized the microstructure and improved breakdown strength of the glass–ceramics.•Permittivity and discharged energy density were obviously enhanced by adding CeO2.