Patent ID: 7845768

Claim:
A liquid droplet ejection head comprising; a piezoelectric actuator using a piezoelectric ceramic composition incorporating a solid solution of a primary component represented by Formula (1) and a sub-component represented by Formula (2), which is added in an amount of less than 1 mol % of the total amount of the solid solution, {Li X (K 1-Y Na Y ) 1-X }(Nb 1-Z-W Ta Z Sb W )O 3 , Formula (1) wherein x, y, z and W are within the ranges of 0≦x≦0.2, 0≦y≦1, 0<z≦0.4, and 0<w≦0.2, respectively, ABO 3 , Formula (2) wherein A represents Bi, and B represents at least any one of Fe, In, and Sc.