Samsung Electro-mechanics Co., Ltd.

Joo Hyun Yoo

Jong Sun Kim

Choong Sik Yoo

Yong Woo Lee

A piezoelectric ceramic composition with superior dielectric constant, mechanical quality factor Qm and electromechanical coupling factor Kp, and a high power output piezoelectric transformer made from the composition are disclosed. The piezoelectric ceramic composition is composed of Pb &lsqb;(Sb Nb ) (Zr Ti ) &rsqb; O &plus;yPbO&plus;zMnO, where x is 0.01-0.05, y is 0.3-0.6 wt %, and z is 0.7 wt % or less.

Piezoelectric ceramic composition, and high power output transformer made of the same composition

A piezoelectric ceramic composition with superior mechanical quality factor Qm and electromechanical coupling factor Kp, and a high power output piezoelectric transformer made from the composition are disclosed. The piezoelectric ceramic composition according to the present invention is composed of Pb Sr &lsqb;(Ni W ) (Mn Nb ) (Zr Ti ) &rsqb;O &plus;kPbO, where a is 0-0.06, b is 0.01-0.05, c is 0.01-0.09, x is 0.47-0.53, and k is 0.1-0.7 wt %.

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Choongchungbook-do, South Korea

Joo Hyun Yoo