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|1. (WO2018180770) PIEZOELECTRIC COMPOSITION AND PIEZOELECTRIC ELEMENT|
|Title:||PIEZOELECTRIC COMPOSITION AND PIEZOELECTRIC ELEMENT|
[Problem] To provide: a piezoelectric composition able to achieve a balance between mechanical strength and electromechanical coupling coefficient k31; and a piezoelectric element comprising the piezoelectric composition. [Solution] A piezoelectric composition which contains manganese and a composite oxide having a perovskite structure represented by general formula ABO3, wherein the piezoelectric composition is characterized in that: the A site element in the ABO3 is potassium or potassium and sodium; the B site element is niobium; and in the piezoelectric composition, a variation exists in the concentration distribution of manganese, and this variation is 35-440% in terms of CV value.