Chemical prepared niobium modified PZT-95/5 antiferroelectric ceramics and the field-induced phase transformation properties

A two step method by mixing the coprecipited powder and oxide was developed to prepare the niobium doped PZT95/5 ceramic. The niobium was doped by adding the niobium pentoxide to the coprecipitated PZT powders. The crystalline phase, size and compositional homogeneity of powders were examined by XRD, SEM and XRF. The performances of phase transformation induced by electric fields and pressures in coprecipitate ceramic samples were measured. An antiferroelectric hysteresis loop in fresh specimen and the ferroelectric to antiferroelectric phase transformation pressure in poled ceramic specimen were measured for the composition of Pb_0.99(Zr_0.95Ti_0.05) _0.98Nb_0.02O₃.