PURPOSE: To provide a piezoelectric ceramics compsn. capable of burning at a low temp., not requiring the use of a special sheath case for controlling the atmosphere of Pb at the time of burning and not requiring the use of an expensive material such as Pt as an internal electrode in the case of production of a ceramic device burnt in one body such as a piezoelectric actuator.

CONSTITUTION: This piezoelectric ceramics compsn. is a perovskite type piezoelectric porcelain compsn. represented by a general symbol ABO3 and having xPb(Niα/3Nb2/3)O3-yPbZrO3-zPbTiO3 (where 0.20≤x≤0.60, 0.15≤y≤0.60 and 0.30≤z≤0.60) as the basic compsn. The ratio (α) of Ni at the B site is >1 to <2 exceeding the stoichiometric compsn.