Structural and Electrical Properties of Low Temperature Sintered Li₂CO₃ Doped (Ba,Sr)TiO₃ Ceramics

In this paper, we present the results of the fabrication and characterization of Li₂CO₃ doped (Ba,Sr)TiO₃ ceramics for the low temperature sintering processes. In these days, low temperature sintering process has been widely spread out for the integrated electronic modules for the communication systems such as front-end modules, antenna modules, and switching modules. Generally it is believed that low temperature sintering process can be applied to the functional materials if they can be sintered less than 900 °C. However, BaSrTiO₃ materials for the tunable microwave devices applications have relatively high sintering temperature of 1350 °C. Therefore, in this study to obtain low sintering temperature, we have added 1–5 wt % of Li₂CO₃ to BaSrTiO₃ materials to reduce the sintering temperature from 1350 to around 900 °C.