Microstructure and Dielectric Properties of Ti0.995(In0.5Nb0.5)0.005O2/SrO-B2O3-SiO2 Glass-ceramics for Energy Storage

The Ti-0.995(In0.5Nb0.5)(0.005)O-2/SrO-B2O3-SiO2 glass-ceramics for dielectric energy storage applications were prepared and investigated. The optimal microstructure of the glass-ceramics has been achieved by adopting Ti-0.995(In0.5Nb0.5)(0.005)O-2 with colossal dielectric constant as grains and SrO-B2O3-SiO2 glass with high resistivity as grain boundaries. After the introduction of SrO-B2O3-SiO2 glass, it was found that the breakdown strength increased several times higher than that of pristine Ti-0.995(In0.5Nb0.5)(0.005)O-2 ceramics. Meanwhile, the energy density increased more than four times and energy efficiency is more than one time. An outstanding energy density of 1.55 J/cm(3) and a high energy efficiency of 70% for Ti-0.995(In0.5Nb0.5)(0.005)O-2 ceramic with 2 wt% SrO-B2O3-SiO2 glass were obtained at an electric field of 328.3 kV/cm, suggesting that this kind of glass-ceramic could be an attractive candidate for energy storage applications.