PIEZO-ELECTRIC MATERIAL, MULTI-LAYER ACTUATOR AND METHOD FOR PRODUCING A PIEZO-ELECTRIC COMPONENT

摘要

Piezoelectric material (A) comprising a metal containing material, is claimed. Piezoelectric material (A) comprising a material with a sum formula of (P1 1 - c - dD cZ d), where the material D contains a Kryolith-structure of formula ((M 1) 4[(M 2) 2 - 2 x / 3Nb 2 + 2 x / 3]O 1 1 + xV o , 1 - x), is claimed. P1 : a composition of formula (Pb(Zr 1 - yTi y)O 3); 1-y : 0.50-0.60 (preferably 0.53); Z : an additive of the Perovskite-structure type; D : a material of formula ([(M 1O) 1 - p(M 2O) p] a[Nb 2O 5] 1 - a); M 1Ba 1 - tSr t; t : 0-1 (preferably 1); M 2strontium and/or calcium; V ooxygen vacancy defect, forming a solid solution with lead zirconate titanate-host lattice; a : 0.67-1 (preferably 0.67-0.8) or 0.85-1; x : 0-1 (preferably 0); and p : greater than 0 to less than 1 (preferably 0.25-0.33). Independent claims are included for: (1) a piezoelectric-multi layered actuator comprising at least a dielectric layer and at least two electrodes, where the dielectric layer comprises a piezoelectric material; and (2) the manufacture of a piezoelectric building element containing (A) comprising increasing the concentration of the vacancy defect during the sintering of the ceramic material and lowering the cooling off of the ceramic material.