Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of $ M_2O_3$ on the Sinterbility and Electrical Conductivity of $ZrO_2(Y_2O_3)$ System(II) : Ceramics of the $ZrO_2(Y_2O_3)$-$Sb_2O_3)$ System

$ZrO_2(Y_2O_3)$계 세라믹스의 소결성과 전기전도도에 대한 $ M_2O_3$의 영향 (II): $ZrO_2-Y_2O_3-Sb_2O_3$계 세라믹스

  • 오영재 (한국과학기술원 무기재료연구실) ;
  • 정형진 (한국과학기술원 무기재료연구실) ;
  • 이희수 (연세대학교 요업공학과)
  • Published : 1986.06.01
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Abstract

Yttria-antimonia-stabilized zirconia was investigated with respect to the amount of $Sb_2O_3$ addition in the range of 0.5~5mole% to the base composition of $(ZrO)_{0.92}(Y_2O_3)_{0.08}$ The sinterbility modulus of rupture Vickers hardness evaporation of components phase form-tion and mcicrostructure were evaluated with antimonia content. Also two probe A. C conductivity measurement was subjected to all specimens and the best results are achieved with 1mol% $Sb_2O_3$ as a sinter agent and relative density of~98% obtained at 140$0^{\circ}C$ and this composition has a maximum electrical conductivity due to the possible substition of $Sb^{3+}$ for $Zr^{4+}$ site. The effect of $Sb_2O_3$ on the electrical conductivity of th bulk and the grain boundaries has on investigated using frequency dispersion analysis (5~106 Hz) Antimonia addition has a negative in-fluence on both the bulk and the grain boundary conductivity except for a 1 mon% addition. The additive antimonia has improve a modulus of rupture to 60~MPa due to metastable-tetragonal phase apparence and decrease the hardness with increasing the $Sb_2O_3$ content.

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References

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