The effect of Mo and Ba additives with the presence of Co on piezoelectric and dielectric properties of lead zirconate titanate ceramics

The effect of a mixture of barium, molybdenum and cobalt ions on the dielectric and piezoelectric properties of PZT5 ceramics was investigated. Ba, Co and Mo doped  lead zirconate titanate (PZT) were prepared via conventional wet chemical method. PZT-type samples were polling by a low-temperature method. XRD analysis of the calcined powders confirms that there is no change in the crystal structure of PZT on co-doping with Ba, Co and Mo. It was found that the addition of 2% mol Ba, 2% mol Co, and 2% mol Mo simultaneously has a positive effect on a set of dielectric and piezoelectric parameters, which are important for the practical applications of this PZT - type ceramics. The mechanical quality factor Qm was 250 for the sample mixed with 1% mol Ba and 2% mol Co and 220 for the sample mixed with 1% mol Mo and 2% mol Co. The maximum electromechanical coupling coefficient and piezoelectric charge coefficient d33 for the sample combined with 2% mol Ba and 1% mol Co was obtained, which is equal to 0.36 and pC/N185, respectively. PZT samples doped with Ba, Co, and Mo may be potential candidates for underwater sonar and high power ultrasonic transducer systems.