Piezoelectric membrane, inkjet head, method using an inkjet head to form images, angular-velocity sensor, method using an angular-velocity sensor to measure angular velocity, piezoelectric generation element, and electricity-generation method using piezoelectric generation element

Disclosed is a piezoelectric membrane that contains a lead-free ferroelectric material and exhibits low dielectric loss and piezoelectric performance as high as that of PZT. Also disclosed is a method for manufacturing said piezoelectric membrane. Said piezoelectric membrane is provided with a (110)-oriented (NaxBiy)TiO0.5 x +1.5 y +2-BaTiO3 layer (with 0.30 <= x <= 0.46 and 0.51 <= y <= 0.62).