PIEZOELECTRIC COMPOSITION AND PIEZOELECTRIC DEVICE

The invention discloses a piezoelectric composition, and the composition comprises an oxide having a perovskite structure, wherein the oxide contains bismuth, barium, iron and titanium; the X-ray diffraction pattern of the piezoelectric composition after a polarization treatment has a first peak and a second peak in the range of the diffraction angle 2theta of 38.6 degrees or more and 39.6 degreesor less; the diffraction angle 2theta of the first peak is smaller than the diffraction angle 2theta of the second peak; an intensity of the first peak is represented as IL; an intensity of the second peak is represented as IH; and IH/IL is 0.00 or more and 2.00 or less. 本发明提供一种压电组合物，其含有具有钙钛矿结构的氧化物，氧化物含有铋、钡、铁、及钛，极化处理后的压电组合物的X射线衍射图案在衍射角2θ为38.6°以上且39.6°以下的范围内具有第一峰及第二峰，第一峰的衍射角2θ比第二峰的衍射角2θ小，第一峰的强度表示为I，第二峰的强度表示为I，I/I为0.00以上且2.00以下。