US 12,304,204 B2
Piezoelectric body, piezoelectric element, and liquid ejection head
Kazuya Kitada, Nagano (JP); Tomohiro Sakai, Nagano (JP); and Yasuto Kakemura, Yamanashi (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Dec. 23, 2022, as Appl. No. 18/145,883.
Claims priority of application No. 2021-212446 (JP), filed on Dec. 27, 2021.
Prior Publication US 2023/0202175 A1, Jun. 29, 2023
Int. Cl. B41J 2/14 (2006.01); C01G 33/00 (2006.01); H10N 30/00 (2023.01); H10N 30/20 (2023.01); H10N 30/853 (2023.01)
CPC B41J 2/14201 (2013.01) [C01G 33/006 (2013.01); H10N 30/2047 (2023.02); H10N 30/708 (2024.05); H10N 30/8542 (2023.02); C01P 2002/34 (2013.01); C01P 2002/77 (2013.01); C01P 2002/82 (2013.01); C01P 2006/40 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A piezoelectric body having a perovskite structure, comprising:
potassium;
sodium; and
niobium, wherein
Raman shifts of peaks which are assigned to A1g and are obtained for a plurality of measurement regions of the piezoelectric body, respectively, by performing Raman spectroscopic analysis on the plurality of measurement regions are 600 cm−1 or more and 610 cm−1 or less, and
a difference between a maximum Raman shift value among the Raman shifts of the peaks and a minimum Raman shift value among the Raman shifts of the peaks in the plurality of measurement regions is 4.5 cm−1 or less.