PIEZOELECTRIC MATERIAL, PIEZOELECTRIC ELEMENT, LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND ULTRASONIC MEASURING APPARATUS

摘要

A piezoelectric material is expressed as a mixed crystal including a complex oxide having a perovskite structure and a rhombohedral structure and a complex oxide having a perovskite structure and a tetragonal structure, and the molar ratio of the complex oxide having a rhombohedral structure to the complex oxide having a tetragonal structure (rhombohedral crystal/tetragonal crystal) is 0.54 to less than 1.20.