US 11,659,769 B2
Piezoelectric composition and piezoelectric element
Masakazu Hirose, Tokyo (JP); Yuiko Hirose, Tokyo (JP); and Hiroki Katoh, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Appl. No. 16/497,052
Filed by TDK CORPORATION, Tokyo (JP)
PCT Filed Mar. 20, 2018, PCT No. PCT/JP2018/011037
§ 371(c)(1), (2) Date Sep. 24, 2019,
PCT Pub. No. WO2018/180770, PCT Pub. Date Oct. 4, 2018.
Claims priority of application No. JP2017-062381 (JP), filed on Mar. 28, 2017.
Prior Publication US 2020/0243748 A1, Jul. 30, 2020
Int. Cl. H01L 41/187 (2006.01)
CPC H10N 30/8542 (2023.02) [H10N 30/072 (2023.02); H10N 30/50 (2023.02); H10N 30/097 (2023.02)] 8 Claims
OG exemplary drawing
 
1. A piezoelectric composition comprising manganese and a complex oxide having a perovskite structure represented by compositional formula (Kx, Nay)NbO3,wherein
x and y in the compositional formula satisfy 0.800≤x≤1.005, y≤0.190, and 0.980≤x+y≤1.005,
a concentration distribution of the manganese has a variation, and
the variation shows a CV value of 35% or more and 440% or less.