Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Piezoelectric Properties of Pb-free Bi(Na,K)$TiO_3-SrTiO_3$ Ceramics with the Amount of $CeO_2$ Addition

$CeO_2$첨가에 따른 무연 Bi(Na,K)$TiO_3-SrTiO_3$ 세라믹스의 압전특성

  • Published : 2004.07.05
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Abstract

In this study, lead-free piezoelectric ceramics were investigated for pressure sensor applications as a function of the amount of $CeO_2$ addition at Bi(Na,K)$TiO_3-SrTiO_3$ system. With increasing the amount of $CeO_2$ addition, the density and dielectric constant increased. Electromechanical coupling factor($k_p$) showed the maximum value(kp, 0.39) at 0.1wt% $CeO_2$ addition and decreased above 0.1wt% $CeO_2$ addition., Density, dielectric constant(${\varepsilon}_r$) increased but mechanical quality factor(Qm), piezoelectric constant(d33) decreased in $CeO_2$ addition, respectively.

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