| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid ejection head destruction of which is suppressed while minimizing decrease in the amount of displacement due to repetitive driving, and to provide a liquid ejection device, a piezoelectric element, an ultrasonic transducer and an ultrasonic device.SOLUTION: A liquid ejection head includes a piezoelectric element 300 laminating a first electrode 60, a piezoelectric layer 70 formed of a piezoelectric material, and a second electrode 80. The piezoelectric layer 70 includes a first piezoelectric part 71, a second piezoelectric part 72 and a third piezoelectric part 73 formed of a common piezoelectric material from the first electrode 60 side toward the second electrode 80 side. The first piezoelectric part 71 and the third piezoelectric part 73 contain nickel and lantern, in addition to the piezoelectric material, and the second piezoelectric part 72 contain only nickel, in addition to the piezoelectric material. |
