“…In particular, Na 1/2 Bi 1/2 TiO 3 -based materials exhibit superior mechanical [ 11 ] and high power [ 9 ] properties in comparison to the lead-based Pb(Zr,Ti)O 3 . Further, processing strategies such as chemical doping [ 12 , 13 , 14 ], composite formation [ 15 , 16 , 17 ] and quenching [ 18 ] have been demonstrated to significantly alter the conductivity [ 19 ], strain [ 20 ], mechanical quality factor [ 14 , 21 , 22 ] and depolarization temperature [ 14 , 16 , 23 ]. In recent years, quenching from sintering temperature has been adopted as a route to enhance the depolarization temperature (T d ) of Na 1/2 Bi 1/2 TiO 3 (NBT) [ 18 ].…”