“…However, PZT based ceramics have too high sintering temperature that is above 1200 • C, which induces evaporation of PbO during the sintering process [10]. Therefore, low temperature sintering of materials with maintaining the excellent piezoelectric properties is desirable for the use of high-electrical conductivity Ag metals as internal electrodes in order to reduce the cost during the fabrication process, which can cause serious pollution on the environment during the sintering process [11].…”