WO$_3$를 첨가한 SrTiO$_3$ 세라믹스의 전기적 성질에 관한 연구

Study on the electrical properties WO$_3$-doped SrTiO$_3$ ceramics

  • 유인규 (한국과학기술연구원 세라믹스부) ;
  • 김효태 (고려대학교 재료공학부) ;
  • 변재동 (고려대학교 재료공학부) ;
  • 김윤호 (한국과학기술연구원 세라믹스부)
  • 발행 : 1995.05.01

초록

The effect of WO$_3$ addition and sintering condition on the electrical properties of SrTiO$_3$ceramic have been investigated. Resistivity and capacitance of grains and grain boundaries were obtained by applying impedance spectroscopy. From the result it could be concluded that the temperature dependance of capacitance of WO$_3$doped specimens were influenced directly by the variation of grain boundary capacitance. It was also found that the dispersion frequency increased as the degree of reduction of the specimen increased. The dispersion frequency characteristics showed discernably that the resistivity of the specimen varied with WO$_3$ content. The dielectric properties were influenced directly by the reduction of the specimens. The dielectric constant of grain boundaries of BL capacitor could be obtained by Cole-Cole plot and was influeneced by the amount of WO$_3$ added.

키워드