Liquid-ejecting head and liquid-ejecting apparatus

摘要

A liquid-ejecting head includes a pressure-generating chamber communicating with a nozzle opening and includes a piezoelectric element including a piezoelectric layer and electrodes. The piezoelectric layer contains bismuth sodium potassium titanate and satisfies the inequality 0≦Pr/Pm≦0.25 at 25° C., where Pm and Pr are the saturation polarization and remanent polarization, respectively, of the piezoelectric layer.

主权项

1. A piezoelectric element comprising:
a piezoelectric layer having a thickness of less than 10 μm, and a pair of electrodes associated with the piezoelectric layer, wherein the piezoelectric layer contains a perovskite structure bismuth sodium potassium titanate and satisfies the inequality 0≦Pr/Pm≦0.25 at 25° C., where Pm and Pr are the saturation polarization and remanent polarization, respectively, of the piezoelectric layer, the saturation polarization (Pm) being a polarization of the piezoelectric layer when supplied with an electric field of 200 kV/cm to 1000 kV/cm.