한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제52권6호
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  • Pages.521-526
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  • 2015
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Preparation of Ce0.8Gd0.2O1.9 Powder Using CeO2 Powder and Gd Precipitation and Effect of CoO doping on Sintering

  • Sim, Soo-Man (School of Materials Science and Engineering, Hongik University)
  • 투고 : 2015.08.10
  • 심사 : 2015.10.04
  • 발행 : 2015.11.30
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초록

$Ce_{0.8}Gd_{0.2}O_{1.9}$(GDC20) powder was prepared from a mixture of submicron-sized $CeO_2$ powder and Gd precipitates using ammonium carbonate $((NH_4)_2CO_3)$ as a precipitant. The mixture was calcined at $700^{\circ}C$ for 4 h followed by ball-milling that resulted in the GDC powder with an average particle size of $0.46{\mu}m$. The powder had a very uniform particle size distribution with particle sizes ranging from $0.3{\mu}m$ to $1{\mu}m$. Sintering of undoped GDC samples did not show a relative density of 99.2% until the temperature was increased to $1500^{\circ}C$, whereas GDC samples doped with 5 mol% CoO exhibited a significant densification at lower temperature reaching a relative density of 97.6% at $1100^{\circ}C$ and of 98.8% at $1200^{\circ}C$.

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참고문헌

  1. H. Inaba and H. Tagawa, "Review Ceria-Based Solid Electrolytes," Solid Sate Ionics, 83 1-16 (1996). https://doi.org/10.1016/0167-2738(95)00229-4
  2. K. Higashi, K. Sonoda, H. Ono, S. Sameshima, and Y. Horata, "Synthesis and Sintering of Rare-Earth-Doped Ceria Powder by Oxalate Coprecipitation Method," J. Mater. Res., 14 [3] 957-67 (1999). https://doi.org/10.1557/JMR.1999.0127
  3. I.-D. Han, K.-Y. Lim, and S.-M. Sim, "Preparation and Sintering Characteristics of Gd-doped $CeO_2$ Powder by Oxalate Co-Precipitation," J. Korean Ceram. Soc., 43 [10] 666-72 (2006). https://doi.org/10.4191/KCERS.2006.43.10.666
  4. D. Hair Prasad, H.-R. Kim, J.-S. Park, J.-W. Son, B.-K. Kim, H.-W. Lee, and J.-H. Lee, "Superior Sinterability of Nono-Crystalline Gadolinium Doped Ceria Powders Synthesized by Co-Precipitation Method," J. Alloys Compd., 495 238-41 (2010). https://doi.org/10.1016/j.jallcom.2010.01.137
  5. J.-G. Li, T. Ikegami, Y. Wang, and T. Mori, "10 mol% $Gd_2O_3$-Doped $CeO_2$ Solid Solutions via Carbonate Coprecipitation: A Compartive Study," J. Am. Ceram. Soc., 86 [6] 915-21 (2003). https://doi.org/10.1111/j.1151-2916.2003.tb03397.x
  6. A. I. Y. Tok, L. H. Luo, and F. Y. C. Boey, "Carbonate Coprecipitation of $Gd_2O_3$-doped $CeO_2$ Solid Solution Nano-Particles," Mat. Sci. & Eng., A383 229-34 (2004).
  7. Y.-C. Yoo, B.-J. Chung, and S.-M. Sim, "Preparation and Sintering Characteristics of $Ce_{0.8}Gd_{0.2}O_{1.9}$ Powder by Ammonium Carbonate Co-Precipitation," J. Korean Ceram. Soc., 49 [1] 118-23 (2012). https://doi.org/10.4191/kcers.2012.49.1.118
  8. R. O. Fuentes and R. T. Baker, "Structural, Morphological and Electrical Properties of $Gd_{0.1}Ce_{0.9}O_{1.95}$ Prepared by a Citrate Complexation Method," J. Power Sources, 186 268-77 (2009). https://doi.org/10.1016/j.jpowsour.2008.09.119
  9. L. D. Jadhav, M. G. Chourashiya, K. M. Subhedar, A. K. Tyagi, and J. Y. Patil, "Synthesis of Nanocrystalline Gd Doped Ceria by Combustion Technique," J. Alloys Compd., 470 383-86 (2009). https://doi.org/10.1016/j.jallcom.2008.02.077
  10. C. M. Kleinlogel and L. J. Gauckler, "Sintering and Properties of Nanosized Ceria Solid Solutions," Solid State Ionics, 135 567-73 (2000). https://doi.org/10.1016/S0167-2738(00)00437-9
  11. G. S. Lewis, A. Atkinson, B. C. H. Steele, and J. Drennan, "Effect of Co Addition on the Lattice Parameter, Electrical Conductivity and Sintering of Gadolinia-doped Ceria," Solid State Ionics, 152-153 567-73 (2002). https://doi.org/10.1016/S0167-2738(02)00372-7
  12. J. D. Nicholas and L. C. De Jonghe, "Prediction and Evaluation of Sintering Aids for Cerium Gadolinium Oxide," Solid State Ionics, 178 1187-94 (2007). https://doi.org/10.1016/j.ssi.2007.05.019
  13. D. Hari Prasad, S. Y. Park, H. Ji, H.-R. Kim, J.-W. Son, B.-K. Kim, H.-W. Lee, and J.-H. Lee, "Cobalt Oxide Co-doping Effect on the Sinterability and Electrical Conductivity of Nano-Crystalline Gd-Doped Ceria," Ceram. Int., 38S S497-S500 (2012).
  14. J. Ma, T. S. Zhang, L. B. Kong, P. Hing, and S. H. Chan, "$Ce_{0.8}Gd_{0.2}O_2$-${\delta}$ Ceramics Derived from Commercial Submicron-Sized $CeO_2$ and $Gd_2O_3$ Powders for Use as Electrolytes in Solid Oxide Fuel Cells," J. Power Sources, 132 71-76 (2004). https://doi.org/10.1016/j.jpowsour.2003.12.029
  15. R. S. Torrens, N. M. Sammes, and G. A. Tomsett, "Characterisation of ($CeO_2)_{0.8}(GdO_{1.5})_{0.2}$ Synthesised Using Various Techniques," Solid State Ionics, 111 9-15 (1998). https://doi.org/10.1016/S0167-2738(98)00172-6