PIEZOELEKTRISCHE KERAMISCHE WERKSTOFFE AUF DER BASIS VON BLEIZIRKONATTITANAT (PZT) MIT KRISTALLSTRUKTUR DES PEROWSKITS

摘要

The invention relates to piezoelectric ceramic materials based on the system Pb(Zr,Ti)OSUB3/SUB, i.e. solid solutions of lead zirconate PbTOSUB3/SUB, characterized by having very good dielectric and electromechanical properties that can be adopted for different uses by modifying the composition. The piezoelectric ceramic materials based on the system Pb(Zr,Ti)OSUB3 /SUBare modified in order to obtain a high level of piezoelectric activity. The invention provides piezoelectric ceramic materials based on lead zirconate titanate (PZT) having the crystal structure of perovskite with formula ASUP2+/SUPBSUP4+/SUPOSUB3/SUBSUP2-/SUP, which are characterized by a substitution of heterovalent acceptor and donator ions at Zr/Ti sites.