Patent ID: 10868232

Abstract:
A piezoelectric material includes a metal oxide containing at least Ba, Ca, Ti, Zr, and Mn, in which the piezoelectric material has a perovskite structure, in which: x, which represents a ratio of a content (mol) of Ca to A (mol) representing a total content of Ba and Ca, falls within a range of 0.10≤x≤0.18; y, which represents a ratio of a content (mol) of Zr to B (mol) representing a total content of Ti, Zr, and Mn, falls within a range of 0.055≤y≤0.085; and z, which represents a ratio of a content (mol) of Mn to the B (mol), falls within a range of 0.003≤z≤0.012, and in which the piezoelectric material satisfies a relationship of 0≤(|d31(−20u)−d31(−20d)|)/|d31(−20u)|≤0.08, and has a value of 130 pm/V or more for each of |d31(−20u)| and |d31(−20d)|.