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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The Ferroelectric Frequency characteristics of Bi$_{4-x}La_x$Ti$_3O_12$ ceramics with the variation of Lanthanum additives

La 첨가량에 따른 Bi$_{4-x}La_x$Ti$_3O_12$ 강유전체의 주파수특성

  • 김응권 (원광대학교 대학원 전자재료공학과) ;
  • 박복기 (호원대학교 전기전자정보공학부) ;
  • 박기엽 (부산정보대학 전기전자계열) ;
  • 박춘배 (원광대학교 전기전자 및 정보공학부)
  • Published : 2001.11.01
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Abstract

In recent year, Ferroelectric BLT($Bi_{4-x}$La$_{x}$Ti$_3$O$_{12}$) is a promising candidate materials. This study was Practiced to make good conditions of BLT targets. In this study, calcination and sintering temperature were kept at 75$0^{\circ}C$, 110$0^{\circ}C$ for 2 hour respectively. the density obtained 7.612, 7.98, 7.877 g/㎤ as La$_2$O$_3$ contents were 0.0mol%, 0.25mo1%, 0.5mol%. Especially, the lanthanum content of 0.5 mol% measured C-axis (117) preferred orientation more than the others targets in the XRD. In $\varepsilon$$_{r}$-f relationship using by HP 4194 A impedance analyzer, the 0.5 mol% observed above 200 relative dielectric constant. but the dissipation factor was higher than others targets at 100Hz~13MHz range. SEM photograph with the content of La$_2$O$_3$ was observed like rod and plate types.types.s.

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