Patent ID: 8119022

Claim:
A piezoelectric reinforced single crystal having a Perovskite-type crystal structure ([A][B]O 3 ) containing Zr and a composition of the following formula 8: [A][(MN) (1-x-y) Ti x Zr y ]O 3 +cP, (formula 8) wherein A is at least one selected from a group consisting of Pb, Sr, Ba and Bi, M is at least one selected from a group consisting of Ce, Co, Fe, In, Mg, Mn, Ni, Sc, Yb and Zn, N is one selected from a group consisting of Nb, Sb, Ta and W, and x and y satisfy, by mole fraction, following relationships: 0.05≦x≦0.58, 0.05≦y≦0.62; and P is a reinforcing second phase and c satisfies, by volume fraction, the following relationship: 0.001% ≦c≦0.20, wherein said piezoelectric crystal is a reinforced single crystal.