Journal of the Korean Physical Society

Korean Physical Society (한국물리학회)
권호 표지

Piezoelectric Properties of PMS-PZT with $Bi_2O_3$ and $CeO_2$ for a Rosen-Type Transformer

Joo, H.K.;Kim, I.S.;Song, J.S.;Jeong, S.J.;Kim, M.S.;Jeon, S.H.

  • Published : 20090200
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Abstract

Recently, piezoelectric transformers have been applied to many fields. Multi layer piezoelectric transformers have the advantage of high step up ratio, high electromechanical coupling coefficient ($K_p$) and high mechanical quality factor ($Q_m$), but they are subject to the peeling phenomenon and the need for an increased sintering temperature made the price of costly electrodes. Thus, in this study, we discuss a method to fabricate of high-power Rosen-type piezoelectric transformers. The high-power Rosen-type piezoelectric transformers were synthesized using 0.05Pb($Mn_{1/3}Sb_{2/3}$)$O_3$-$0.48PbZrO_3$-$0.47PbTiO_3$ (abbreviated as PMS-PZT) ceramics. The density, the microstructure and the dielectric and piezoelectric properties as functions of the sintering temperature were investigated and an addition of $Bi_2O_3$ and $CeO_2$ resulted in a significant improvement in the piezoelectric properties. The results indicated that the following optimal properties of ceramics were obtained at a sintering temperature of 1200 $^{\circ}C$: $\varepsilon_r$ = 880, $tan{\delta}$= 0.0075, $K_p$ = 0.57, $Q_m$ = 1124 and $d_{33}$ = 304 pC/N.

Keywords

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