A abstract electromechanical transducer comprising a piezoelectric body consisting of pb 1 a m a 3 mn b 3 sb 2 3 x ti y zr z o 3 wherein m is one or more of the alkaline earth metals ca sr and ba and wherein 0 u2266 a u2266 0 15 0 u2266 b u2266 0 20 0 01 u2266 x u2266 0 25 0 40 u2266 y u2266 0 55 0 20 u2266 z u2266 0 59 and 1 this material has the advantage that polarization is effected in a very short period of time at room temperature application_number US 38920182 A description the invention will now be further illustrated with reference to a number of embodiments the starting materials namely lead oxide pbo magnesium oxide mgo antimony pentoxide sb 2 o 5 titanium dioxide tio 2 and zirconium dioxide zro 2 and if necessary sro bao cao and or mno 2 all these materials being of a chemically pure quality are mixed with distilled water in a rubber lined ball mill after wet milling the mixture is dried thereafter the mixture is subjected to a first reaction by heating the mixture for 2 hours at a temperature of approximately 850 u00b0 c in an oxygen atmosphere the material is thereafter allowed to cool after which it is milled again the powder thus obtained is then compressed to form cylinders having a diameter of 15 mm and a height of 20 mm by use of a pressure of 70 mpa the cylinders are sintered for 45.