Patent ID: 8480918

Claim:
A piezoelectric material comprising an oxide represented by the following general formula (1): X{A(1)B(1)O 3 }−(1−X){A(2)B(2)O 3 } (1) wherein the oxide is obtained by forming a solid solution of two perovskite oxides A(1)B(1)O 3 and A(2)B(2)O 3 different from each other in crystalline phase; wherein A(1)B(1)O 3 is a tetragonal crystal, and A(2)B(2)O 3 is at least one of a pseudocubic crystal, a rhombohedral crystal, an orthorhombic crystal, and a monoclinic crystal, and wherein A(1) and A(2) each contains Ba and an element selected from alkaline-earth metals; B(1) contains Cu and Nb and one or more elements selected from pentavalent or hexavalent metal elements; B(2) contains Mg or Co and two or more elements selected from divalent, trivalent, tetravalent, pentavalent, and hexavalent metal elements; B(1) or B(2) contains Cu in a content of 3 atm % or more and 31 atm % or less; and X satisfies the relation 0<X<1.