PIEZOELECTRIC ELEMENT, MULTILAYERED PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, LIQUID DISCHARGE APPARATUS, ULTRASONIC MOTOR, OPTICAL APPARATUS, AND ELECTRONIC APPARATUS Russian patent published in 2017 - IPC H02N2/16 H01L41/09 H01L41/187 H02N2/10 B41J2/14 C04B35/468 G02B7/00 

FIELD: electricity.

SUBSTANCE: invention relates to multilayer piezoelectric element comprising layers of piezoelectric material and electrodes, including an internal electrode, wherein layers of piezoelectric material and electrodes are placed alternately; each layer of piezoelectric material contains as a basic component a metal oxide of perovskite type represented by general formula (1), and manganese, included in composition of metal oxide of perovskite type (Ba_1-xCa_x)_a(Ti_1-yZr_y)O₃, where 1.00≤a≤1.01, 0.02≤x≤0.30, 0.020≤y≤0.095 and y≤x (1); and content of manganese on metal base with respect to 100 weight parts of metal oxide of perovskite type is 0.02 weight parts or more and 0.40 weight parts or less. Invention also relates to a piezoelectric element, liquid discharge head, liquid discharge device, ultrasonic motor, optical device, electronic device.

EFFECT: invention provides a lead-free piezoelectric element, having stable operation in a wide temperature range.

11 cl, 6 tbl, 10 dwg, 55 ex