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 |
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.
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