Mn doping effects on electric properties of 0.93(Bi0.5Na0.5)TiO3‐0.07Ba(Ti0.945Zr0.055)O3 ceramics

Abstract The validity of Mn element on 0.93(Bi 0.5 Na 0.5 )TiO 3 ‐0.07Ba(Ti 0.945 Zr 0.055 )O 3 ceramics ( BNT ‐ BZT ‐ xM n) is certified by doping. On account of multiple effects introduced by Mn, the appropriate Mn content facilitates property improvement effectively. Compared with pure BNT ‐ BZT , d 33 of the component x = 0.25 increases about 8% up to 187 pC /N and Q m of the component x = 1 increases about 84% up to 197. Thermally stimulated depolarization currents ( TSDC ) measurement reveals Mn additive is helpful to pyroelectric properties as well. The Mn‐doped component x = 0.125 exhibits better pyroelectric performance at room temperature. Corresponding pyroelectric coefficient and the figures of merit reach up to 0.061 μC/(cm 2 °C), F i =217 pm/V, F ν = 0.023 m 2 /C, and F d = 12.6 μPa −1/2 , respectively, even superior to lead‐based ceramics. Similar pyroelectric advantage is also observed in the component x = 0.5 near depolarization temperature T d . Mn doping has slight harmful influence on the ferroelectric‐to‐relaxor transition temperature T F −R , as well as T d , but hardly shows restriction on application. These results confirm Mn doping is an available strategy to improve BNT ‐based ceramics. Therefore, Mn‐doped BNT ‐ BZT ceramics will be excellent candidates in area of high‐power piezoelectric application and pyroelectric detectors.