Piezoelectric ceramic material with large power output ability and transformer made of it

摘要

The present invention relates to a piezoelectric ceramic which is used for the piezoelectric transformer, and an object thereof is to provide a transformer the mechanical quality factor (Qm), the electromechanical coupling factor (Kp) and the superior high power using the same piezoelectric ceramic composition to provide.; The present invention for achieving the abovementioned objects is; Pb _1-a Sr _a [( ) _B ( ) _C (and composition as _{Zr 1-x Ti x) 1} -bc] O 3 + kPbO, a is 0~0.06mol, b is 0.01~0.05mol, c is 0.01~0.07mol, x is 0.47~0.53mol, high-power piezoelectric ceramic composition of k is made of a 0.1~0.7wt; and; The piezoelectric ceramic composition with the piezoelectric block;; The first electrode is an internal electrode and electrically isolated from each other with the internal electrodes formed on a central portion of a side surface of the piezoelectric blocks made of external electrodes formed on the outside;; And that on to the technical aspect; transformer composed of a second electrode formed on the lower surface of the piezoelectric block.