Effect of sintering condition on the dielectric properties of (Ba,Sr)TiO3 glass-ceramic

The investigation of the structure and dielectric properties of (Ba,Sr)TiO3-based ferroelectric glass-ceramic was carried out. Attention has been focused on the relationships between sintering conditions, microstructure and dielectric properties. The sintering temperature and time have been found to have pronounced effects on the density, grain growth and dielectric properties of the sintered BST glass-ceramics. When increasing sintering temperature, the dielectric constant increases largely, the dielectric loss, however, does not change obviously at paraelectric state. The tunability of dielectric constant increases largely with the increasing of sintering time form 0.5 to 4 h. A maximum tunability of 39.8% and a low dielectric loss of 0.00612 are obtained under sintering conditions of 1150 °C for 4 h.