Patent ID: 8034250

Claim:
A piezoelectric material comprising a perovskite-type composite oxide represented by the general formula (1): x ABO 3 - y A′BO 3 - z A″B′O 3 wherein A is a Bi element; A′ is a rare earth element including La; B is at least two elements including Ti and Zn and is selected from Ti, Zn, Sn and Zr; A″ is at least one element selected from Ba, Sr and Ca; B′ is at least one element selected from divalent, trivalent, pentavalent, tetravalent, and hexavalent elements; and x is a value of 0.10 or more and 0.95 or less, y is a value of more than 0 and 0.5 or less, and z is a value of 0 or more and 0.7 or less, provided that x+y+z=1.