What is PZT piezoelectric ceramics

Soft replace PZT piezoelectric ceramics PZT ceramics are incorporated in the price higher than the Pb2 + La3 +, Bi3 +, Sb3 + and other ions or electricity than Ti4 + high Nb5 +, Ta5 +, Sb5 +, W6 + plasma. Doped PZT ceramics decrease the coercive field Ec, ε, Kp, tgδ increase, Qm fall, aging resistance enhancement, ρv increases. 

     Here, "soft" refers to the addition of these additives can decrease the coercive field EC, and thus the electric field or the stress, the material properties change "soft." 

     Material properties change "soft" interpretation by the stress buffering effect. Pb ion substitution results in the absence of high stress can be buffered geometric distortion produced, so that the electrical domain directional activation energy decreased electrical domains easy movement and easier along the external electric field orientation. 

     Replace hard PZT piezoelectric ceramics PZT ceramics are incorporated in the price lower than the Pb2 + Na +, K + and other ions or lower price than the Ti4 + Fe2 +, Co2 +, Ni2 +, Cr3 + and other ions. Doping PZT ceramics increases the coercive field Ec, ε, Kp, tgδ down, Qm is increased, aging resistance decreased, ρv is reduced. 

     Here the "hard" refers to the addition of these additives can increase the coercive field EC, and thus in the electric field or stress, pre-polarization and depolarization are more difficult, material properties change "hard." 

     Material properties change "hard" is due to the absence of Pb decreased buffering effect is weakened, the space charge density increases, the reverse bias easier to build power plants, distorted octahedral, so that electrical domain steering subject to greater resistance .