公开(公告)号：US20210091298A1

公开(公告)日：2021-03-25

申请号：US17040310

申请日：2019-03-19

Applicant: TDK CORPORATION

Inventor： Masakazu HIROSE ,  Yuiko HIROSE ,  Hiroki KATOH ,  Tamotsu SASAKI ,  Yuji UMEDA

IPC: H01L41/187 ,  C04B35/495

Abstract: A piezoelectric composition containing: a complex oxide having a perovskite structure represented by a general formula of ABO3; copper; and one or more elements selected from the group consisting of chromium, nickel and zinc, in which in ABO3, an A-site element is potassium and a B-site element is niobium, or niobium and tantalum, with respect to 1 mol of the complex oxide, a content ratio of the copper is α mol % in terms of CuO, a content ratio of one or more elements selected from the group consisting of chromium, nickel and zinc is β mol % in terms of CrO3/2, NiO, ZnO, α satisfies a relationship of 0.2≤α≤2.5, and β satisfies a relationship of 0.2≤β≤2.0.