Piezoelectric/electrostrictive material, piezoelectric/electrostrictive body, and piezoelectric/electrostrictive element

摘要

A piezoelectric/electrostrictive material having a nonstoichiometric composition represented by a general formula (1):         (1 - x) (BiaNabTiO3+δ)-x(KcNbO3+ζ)     (1)wherein 0.01 ≤ x 0.08, a 0.5, 1.01 ≤ (a/b) ≤ 1.08, 0.92 ≤ (a + b)/c 0.99, and 0.9 ≤ c ≤ 1.1, and ζ ≠ 0 when δ = 0 and δ ≠ 0 when ζ = 0.