Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Dielectric and Pyroelectric Properties of Dy-doped BSCT Thick Films by Screen-printing Method

  • Noh, Hyun-Ji (Dept. of Ceramic Engineering, Eng. Res, Insti., i-cube Center, Gyeongsang National University) ;
  • Lee, Sung-Gap (Dept. of Ceramic Engineering, Eng. Res. Insti., i-cube Center, Gyeongsang National University) ;
  • Nam, Sung-Pill (Dept. of Ceramic Engineering, Eng. Res, Insti., i-cube Center, Gyeongsang National University)
  • Published : 2009.12.01
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초록

$(Ba_{0.57}Sr_{0.33}Ca_{0.10})TiO_3$(=BSCT) powders, prepared by the sol-gel method, were doped using $MnCO_3$ as the acceptor and $Dy_2O_3$ as the donor. This powder was mixed with an organic vehicle. BSCT thick films were fabricated by the screen-printing techniques on the alumina substrate. The structural and dielectric properties of BSCT thick films were investigated with variation of the $Dy_2O_3$ amount. As a result of the differential thermal analysis (DTA), the exothermic peak was observed at around $670^{\circ}C$ due to the formation of the polycrystalline perovskite phase. All the BSCT thick films showed the XRD patterns of a typical polycrystalline perovskite structure. The average grain size of BSCT thick films decreased with an increasing amount of $Dy_2O_3$. The relative dielectric constant and dielectric loss of the BSCT thick film doped $Dy_2O_3$ 0.1mol% were 4637.4 and 1.6% at 1kHz, respectively.

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