Sintering and characterization of Ca_0.9Sr_0.1 TiO₃ ceramicswith sintering additive

Ca_0.9Sr_0.1TiO₃ was sintered using Li₂Si₂O₅ as a sintering additive for the first time. Although Ca_0.9Sr_0.1 TiO₃ could not be fully sintered even at 1400 °C, the densification temperature could be decreased to 1200 °C by using Li₂Si₂O₅, which possesses low melting temperature of ca. 1030 °C. Consequently, the mechanical and dielectric properties of Ca_0.9Sr_0.1TiO₃ ceramics were improved. The microstructure, mechanical properties, and dielectric properties greatly changed depending on the amount of additive. The optimum concentration to obtain high density and high dielectric strength was 0.5 wt.%. In addition, the results suggested that relative density was the most important parameter to the dielectric properties.