Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effects of Fe2O3 Additions on Sintering Behavior and Electrical Property of Ce0.8Gd0.2O1.9 Ceramics

Ce0.8Gd0.2O1.9 세라믹스의 소결거동과 전기적 특성에 미치는 Fe2O3의 첨가효과

  • Choi, Kwang-Hoon (Department of Advanced Materials Engineering, Kyungsung University) ;
  • Lee, Joo-Sin (Department of Advanced Materials Engineering, Kyungsung University) ;
  • Choi, Yong-Gyu (Gyeongbuk Regional Innovation Agency)
  • 최광훈 (경성대학교 신소재공학과) ;
  • 이주신 (경성대학교 신소재공학과) ;
  • 최용규 (경북전략산업기획단)
  • Published : 2007.10.27
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Abstract

The sintering behavior and electrical property of $Ce_{0.8}Gd_{0.2}O_{1.9}$ ceramics were investigated with the iron oxide concentration ranging from 0 to 5 mol%. Both the sintered density and grain size were found to increase up to 2 mol% $Fe_2O_3$, and then to decrease with further additions. At a higher $Fe_2O_3$ content above 3 mol%, grain size decreased by a pinning effect induced by different shape grains. The electrical conductivity was also increased with increasing $Fe_2O_3$ content up to 2 mol%. Total conductivity of 2 mol% $Fe_2O_3-added$ specimen showed the maximum conductivity of $2{\times}10^{-2}{\Omega}{\cdot}cm^{-1}$ at $500^{\circ}C$. The addition of $Fe_2O_3$ was found to promote the sintering properties and electrical conductivities of $Gd_2O_3-dope\;CeO_2$.

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References

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