Property optimization of BST-based composite glass ceramics for energy-storage applications

In this search, the nanocomposite of the rutile nano TiO2 and alkali-free glass (CaO–MgO–Al2O3–SiO2) were successfully produced by the method of sol–gel, which were sintered at 1200 °C for 2 h. The dielectric properties of the composites were studied. The permittivity of the composite with 15 % alkali-free glass addition is 114, while the breakdown voltage is 52.2 kV/mm and the energy density reaches 1.08 J/cm3 with low loss (<0.01), which is 1.4 times higher than that of pure TiO2 (0.76 J/cm3).