US 11,837,975 B2
Piezoelectric material, piezoelectric element, and electronic equipment
Makoto Kubota, Yokohama (JP); Kanako Oshima, Tokyo (JP); Hisato Yabuta, Machida (JP); Takanori Matsuda, Chofu (JP); Miki Ueda, Tokyo (JP); Fumio Uchida, Daito (JP); Hiroki Imai, Nakatsugawa (JP); Kenji Maeda, Hirakata (JP); and Chiemi Shimizu, Hirakata (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP); and FUJI CHEMICAL CO., LTD., Osaka (JP)
Filed on Jan. 29, 2020, as Appl. No. 16/775,542.
Application 16/775,542 is a continuation of application No. PCT/JP2018/028867, filed on Aug. 1, 2018.
Claims priority of application No. 2017-151949 (JP), filed on Aug. 4, 2017.
Prior Publication US 2020/0169191 A1, May 28, 2020
Int. Cl. H02N 2/10 (2006.01); B41J 2/14 (2006.01); C04B 35/495 (2006.01); C04B 35/626 (2006.01); C04B 35/634 (2006.01); C04B 35/64 (2006.01); H04N 23/52 (2023.01); H10N 30/50 (2023.01); H10N 30/053 (2023.01); H10N 30/87 (2023.01); H10N 30/20 (2023.01); H10N 30/853 (2023.01)
CPC H02N 2/103 (2013.01) [B41J 2/14233 (2013.01); C04B 35/495 (2013.01); C04B 35/62695 (2013.01); C04B 35/63416 (2013.01); C04B 35/64 (2013.01); H04N 23/52 (2023.01); H10N 30/053 (2023.02); H10N 30/2047 (2023.02); H10N 30/50 (2023.02); H10N 30/8536 (2023.02); H10N 30/8542 (2023.02); H10N 30/871 (2023.02); C04B 2235/3234 (2013.01); C04B 2235/3255 (2013.01); C04B 2235/3263 (2013.01); C04B 2235/6021 (2013.01); C04B 2235/6567 (2013.01); C04B 2235/768 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A piezoelectric material comprising:
an oxide containing Na, Ba, Nb, Ti, and Mn,
wherein:
the oxide has a perovskite-type structure,
a total amount of metal elements other than Na, Ba, Nb, Ti, and Mn contained in the piezoelectric material is 0.5 mol % or less with respect to a total amount of Na, Ba, Nb, Ti, and Mn,
a molar ratio x of Ti to a total molar amount of Nb and Ti is 0.05≤x≤0.12, and a molar ratio y of Na to Nb is 0.93≤y≤0.98,
a molar ratio z of Ba to Ti is 1.09≤z≤1.60,
a molar ratio m of Mn to the total molar amount of Nb and Ti is 0.0006≤m≤0.0030, and
1.07≤y×z≤1.50 is satisfied,
wherein the piezoelectric material has a Curie temperature of 235° C. or more, and
wherein the piezoelectric material has a piezoelectric constant |d31| of 61.3 pm/V or more.