Characterization of mechanical properties of BaTiO₃ ceramic with different types of sintering aid by nanoindentation

Abstract

The influence of glass composition on mechanical property of BaTiO₃ ceramics was investigated with nanoindentation technique and also its effect on densification and dielectric property was analyzed. Two different glasses of BaO-CaO-SiO₂ and BaO-ZrO₂-SiO₂ system were used as the sintering aid of BaTiO₃ powder. It was found that the addition of BaO-ZrO₂-SiO₂ glass to BaTiO₃ was beneficial for the densification compared to that of BaO-CaO-SiO₂ glass, resulting in high dielectric constant over 2500, the hardness vale of 13.6 GPa and the elastic modulus of 167.9 GPa after sintering at 1240°C.