Effect of MnCO₃ Doping on Microstructure and Electrical Properties of PSZT Ceramics

Abstract

The effect of manganese doping on microstructure, piezoelectric and electromechanical properties of Pb0.94Sr0.06(Zr0.52Ti0.48)O3 (PSZT) ceramics has studied. The PSZT ceramics doped MnCO3 concentration in the region of 0-1.0 mol% were prepared by a solid-state reaction and conventional sintering process. Phase identification showed the formation of single phase perovskite structure in all compositions. Microstructure and fracture behavior were observed by scanning electron microscopy (SEM). The fracture behavior demonstrated the change of fracture type from trangranular to mix of trans-and inter-granular type with increasing the amount of MnCO3. Dielectric constant (K), d33 and kp were increased when higher amount of MnCO3 was doped. In addition, the mechanical quality factor (Qm) was highest at 0.1 mol% MnCO3 doping in PSZT ceramics.

Synthesis and Characterization of Pb(Zr_0.52Ti_0.48)O₃ Properties via High Planetary Mill

“…According to their studied, the inter-granular fracture appeared from the covering of PbO rich layer on the grain and causing the weakness at the grain boundaries [12]. On the other hand, some grains have not been covered by PbO layer and the fracture illustrated intra granular type as observed by other research [13].…”