Patent ID: 9276193
Filing Date: 2016-03-01
CPC Classification: B06B,B41J,C04B,H01L,H02N

Claim Text:
1. A piezoelectric material comprising: a solid solution including a first component, a second component, and a third component, wherein the first component is a rhombohedral crystal that has a complex oxide with a perovskite structure and Curie temperature Tc1; the second component is a crystal other than a rhombohedral crystal that has a complex oxide with a perovskite structure and Curie temperature Tc2; and the third component has a complex oxide with a perovskite structure in which the component is the same crystal system as the second component and Curie temperature Tc3, Tc1 is higher than Tc2, Tc3 is equal to or higher than Tc1, the value of (0.9×Tc1+0.1×Tc2) is equal to or lower than 280° C., a composition near an morphotropic phase boundary (MPB) line is provided in a phase diagram that employs a composition ratio of a sum of the second component and the third component to a sum of the first component, the second component, and the third component ((the second component+the third component)/(the first component+the second component+the third component)) for a horizontal axis and temperature for a vertical axis, and a Curie temperature Tc4 of the composition is equal to or higher than 280° C.