Optimization of energy storage density in ANb2O6NaNbO3SiO2 (A=[(1−x)Pb, xSr]) nanostructured glass–ceramic dielectrics

The substitution effect of Sr for Pb at A-site was studied for the purpose of energy storage density optimization in ANb2O6NaNbO3SiO2 (A=[(1−x)Pb, xSr]) glass–ceramic dielectrics. At the point of x=0.6, nanostructured glass–ceramics with the highest dielectric constant (∼600) and a relatively high breakdown strength (36.7 kV/mm) were acquired, resulting in the highest energy storage density of 2.27 J/cm3, which is twice higher than those of the end-products (i.e., x=0 and x=1.0).