Gesemann, H.J.H.J.GesemannVoelker, K.K.Voelker2022-03-082022-03-081994https://publica.fraunhofer.de/handle/publica/303066The invention relates to the fields of electrotechnology and electronics and refers to a process which can be applied, e.g., to the production of piezoceramics. The task of the invention consists inproducing "hard PZT" materials which sinter below 1080 degrees C and have K<-r values of above 55 percent and high vibrational Qs. The task is solved by means of a process in which the starting materials used are a PZT material modified from the basic type (Pb<-a Sr<-1-a )(Zr<-x Ti<-1-x-y-z (B->1 600 <-1/3 Nb<-2/3)<-y (B->2 <-1/2 W<-1/2 )<-z )O<-3 where a ranges from 0.90 to 1.03 Mol, x ranges from 0.30 to 0.56 Mol, y ranges from 0.01 to 0.30 Mol, z ranges from 0.01 bis 0.07 Mol and B = Mg, Zn, Ni, Mn, Co, said invention being characterized by the fact that before and/or during fine-grinding of the starting material, 0.05 to 2 percent by weight of MnO<-x and 0.1 to 5 percent by weight of an oxide or an oxide mixture which together with PbO form a melt phase below 1000 degrees C, are added, a nd 0.3 to 3 percent by weight of NiO is added during fine-grinding and all components are sintered below 1100 degrees C.de608666620patent1993-4327993