abstract |
There is provided a piezoelectric ceramics, including a perovskite compound of a non-stoichiometric composition represented by a composition formula (K x Na 1-x ) y (Nb 1-z Ta z )O 3 (0<x<1≦1, 0<y<1, 0≦z≦0.5); and a sintering aid which includes an oxide containing K, Co, and Ta. |