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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Capacitive-Voltage properties of (Sr.Ca)$TiO_3$ Ceramics

(Sr.Ca)$TiO_3$ 세라믹스의 용량-전압 특성

  • 강재훈 (대불대학교 전기공학과) ;
  • 최운식 (대불대학교 전기공학과) ;
  • 김충혁 (광운대학교 전기공학과) ;
  • 김진사 (광운대학교 전기공학과) ;
  • 박용필 (동신대학교 전기전자공학부) ;
  • 송민종 (광주보건대학 의료정보공학부)
  • Published : 2001.11.01
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Abstract

In this study, the capacitance-voltage properties of (Sr$_{1-x}$ .Ca$_{x}$)TiO$_3$(0.05$\leq$x$\leq$0.20)-based grain boundary layer ceramics were investigated. The ceramics were fabricated by the conventional mixed oxide method. The sintering temperature and time were 1480~150$0^{\circ}C$ and 4 hours, respectively. The 2nd phase formed by the thermal diffusion of CuO from the surface leads to very excellent dielectric properties, that is, $\varepsilon$$_{r}$>50000, tan$\delta$<0.05, $\Delta$C<$\pm$10%. The capacitance is almost unchanged below about 20[V] but it decreases slowly about 20[V]. The results of the capacitance-voltage properties indicated that the grain boundary was composed of the continuous insulating layers.ulating layers.s.

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