Patent ID: 8258679

Claim:
A piezoelectric ceramic comprising 100 parts by mass of a bismuth layered compound as a main component and a total of 0.05 to 1 part by mass, in terms of MnO 2 and Fe 2 O 3 , of at least one of Mn and Fe, the bismuth layered compound being represented by a compositional formula of Bi 4 Ti 3 O 12 .β[(1-γ)M1TiO 3 .γM2M3O 3 ], wherein β and γ satisfy the following formulae: 0.405≦β≦0.498 and 0≦γ≦0.3, M1 represents at least one selected from Sr, Ba, Ca, (Bi 0.5 Na 0.5 ), (Bi 0.5 Li 0.5 ) and (Bi 0.5 K 0.5 ), M2 is at least one selected from Bi, Na, K and Li, and M3 is at least one of Fe and Nb.