| abstract |
A piezoelectric material comprising a first component, a second component and a third component, wherein the first component is a rhombohedral crystal system when composed alone, has a Curie temperature of Tc1 and is made of non-lead The second component is a crystal other than the rhombohedral system when it is composed alone, and the Curie temperature Tc2 is higher than the above Tc1 and is composed of a non-lead-based composite oxide with a perovskite structure. The three components are rhombohedral when composed alone, the Curie temperature Tc3 is above the above Tc2, and are composed of a non-lead-based composite oxide having a perovskite structure and different from the above-mentioned first component. The above-mentioned third component When the molar ratio relative to the total of the first component and the third component is α, when α×Tc3+(1−α)×Tc1=Tc4, |Tc4−Tc2| is 50°C or less. |