Surface Reoxidation Mechanism and Electrical Properites of SBLC in $BaTiO_3$ System

$BaTiO_3$계 SBLC의 표면 재산화 형성 기구 및 전기적 성질

  • 이형규 (한국과학기술원 재료공학과) ;
  • 김호기 (한국과학기술원 재료공학과)
  • Published : 1986.05.01


A mechanism for formation of surface reoxidation layer in Surface Boundary Layer Capacitor (SBLC) has been studied. SBLC were prepared by reduction of $BaTiO_3$ doped with $Bi_2O_3$ and electrode firing of silver paste containing $Bi_2O_3$ The apparent dielectric constant was in the order of $10^5$ and the insulation resistance larger than $10^6$$\Omega$ It can be expected that $Bi_2O_3$ dopant in $BaTiO_3$ plays the role of inhibition of grain growth and decreasing the resistivity of $BaTiO_3$. In order to confirm the process of surface reoxidation layer effects of atmosphere and annealing time in electrode sintering were investigated.



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