This study reports the dielectric and piezoelectric properties of 0.4Pb(Mg1/3Nb2/3)O3-0.25PbZrO 3-0.35PbTiO3 (PMN-PZT), 2 mol% MnO2-doped 0.4Pb(Mg1/3Nb2/3)O3-0.25PbZrO 3-0.35PbTiO3 (MnO2+PMN-PZT), and 0.06Pb(Mn 1/3Nb2/3)O3-0.34Pb(Mg1/3Nb 2/3)O3-0.25PbZrO3-0.35PbTiO3 (PMnN+PMN-PZT) ceramics. The results show that MnO2 modification results in the formation of MgO secondary phase which promotes grain growth and reduces the electromechanical properties. We conclusively demonstrate that Mn2+ acts as pervoskite stabilizer in Pb-based (1:2) relaxors and leads to the formation of divalent oxide secondary phase. Modification with PMnN avoids the formation of MgO and provides combinatory doping effect with smaller grain sizes.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry