Patent ID: 8092706

Claim:
A piezoelectric ceramic composition comprising a primary ingredient represented by Formula 1 and an auxiliary ingredient represented by Formula 2, [Li X (K 1-Y Na Y ) 1-X ] a [(Nb 1-Z-W Ta Z Sb W )] b O 3 , Formula 1 wherein 0≦X≦0.2, 0≦Y≦1, 0<Z≦0.4, and 0<W≦0.2, 0.95≦a≦1.05, 0.95≦b≦1.05, Formula 2: BiFeO 3 , wherein BiFeO 3 represents a compound having a perovskite structure; and the amount of an auxiliary ingredient is less than 1 Mol % per 100 mol % of a piezoelectric ceramic composition after an auxiliary ingredient has been added.