Patent ID: 8128834

Claim:
A piezoelectric/electrostrictive porcelain composition, comprising: a perovskite type oxide, containing Li, Na and K as A-site elements and contains at least Nb out of Nb and Ta as B-site elements, where a ratio of a total number of atoms of the A-site elements to a total number of atoms of the B-site elements is not smaller than 1; and a Mn compound, added to said perovskite type oxide, wherein a composition of said perovskite type oxide is represented by a general formula: {Li y (Na 1-x K x ) 1-y } a (Nb 1-z Ta z )O 3 , wherein a, x, y and z satisfy 1<a≦1.05, 0.30≦x≦0.70, 0.02≦y≦0.10, and 0.0≦z≦0.5.