Fig. 1. X-ray diffraction patterns of PSN-PZT ceramics at various PSN amounts of x (mole ratio): (a) 0.02, (b) 0.04, (c) 0.06, and (d) 0.08.
Fig. 2. Sintering density of PSN-PZT ceramics as a function of PSN composition.
Fig. 3. SEM images of PSN-PZT ceramics at various PSN compositions of x: (a) 0.02, (b) 0.04, (c) 0.06, and (d) 0.08.
Fig. 4. Dependence of electromechanical coupling factor (kp) and mechanical quality factor (Qm) on PSN composition in PSN-PZT ceramics.
Fig. 5. Variation of relative dielectric constant (ɛr) with different doping amounts of PSN in PSN-PZT ceramics.
Fig. 6. Effects of PSN composition on piezoelectric charge constant (d33) and piezoelectric voltage constant (g33) in PSN-PZT ceramics.
Fig. 7. The SPL of the piezoelectric speaker measured without (closed circle) and with (open square) an additional vibration media.