Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지
DOI QR코드

DOI QR Code

Fine Powder Synthesis and It`s Sintering Characteristics of Gd2O3Doped CeO2 by the Oxalate Coprecipitation Method

Oxalate 공침법에 의한 Gd2O3Doped CeO2의 미분말 합성 및 그 소결특성

  • Published : 2002.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

10mo1% Gd$_2$O$_3$ doped CeO$_2$ fine powders were synthesized by the oxalate coprecipitation method. The characteristics and sintering behavior of fine powders were investigated. The oxalate precipitates had the specific surface area of 150$m^2$/g, and appeared to be fine and spherical primary particles with a size of approximately 5.5nm. The decomposition of the precipitates occurred from a temperature around 30$0^{\circ}C$ and it was completed below 40$0^{\circ}C$, resulted in the formation of the oxide. The calcination temperature of the fine powders was suitable at 77$0^{\circ}C$. By introducing fine powders washed with alcohol and ball-milling process after calcination, the sintered body was possible to attain the value of 97% of the theoretical density at low temperature of 130$0^{\circ}C$

Keywords

References

  1. Solid Electrolytes Oxide Solid Electrolytes W.L.Worrell;S.Geller(ed.)
  2. J.Electrochem.Soc v.126 Ionic conductivity of calcia, yttria and rare earth-doped cerium dioxide R.T.Dirstine;R.N.Blumenthal;T.F.Kuech https://doi.org/10.1149/1.2129018
  3. Solid State lonics v.20 Electrical properties of calcia-doped ceria with oxygen ion conduction H.Arai;T.Kunisaki;Y.Shimizu;T.Seiyama https://doi.org/10.1016/0167-2738(86)90041-X
  4. J.Mater.Sci v.23 Electrical properties and microstructure in the system ceria-alkaline earth oxide H.Yahiro;T.Ohuchi;K.Eguchi;H.Arai https://doi.org/10.1007/BF01154008
  5. Solid State Ionics v.5 Ionec conductivity of CeO₂with trivalent dopants of different ionic radii R.Gerhardt-Anderson;A.S.Nowick https://doi.org/10.1016/0167-2738(81)90313-1
  6. J.Appl.Electrochem v.18 Oxygen ion conductivity of the ceria-samarium oxide system with fluorite structure H.Yahiro;Y.Eguchi;K.Eguchi;H.Arai https://doi.org/10.1007/BF01022246
  7. Solid State Ionics v.52 Electrical properties of ceria-based oxides and their application to solid oxide fuel cells K.Eguchi;T.Setoguchi;T.Inoue;H.Arai https://doi.org/10.1016/0167-2738(92)90102-U
  8. Solid State lonics v.76 AC Impedance studies of rare earth oxide doped ceria G.B.Balazs;R.S.Glass https://doi.org/10.1016/0167-2738(94)00242-K
  9. Ceramurgia International v.5 Characteristics and sintering behaviour of zirconia ultrafine powder K.Haberko https://doi.org/10.1016/0390-5519(79)90023-1
  10. Ceramic Powders The Influence of Processing Conditions on Sintering Behaviourof Co Precipitated Calcia-stabilized Zirconia Powders A.Roosen;H.Hausner;P.Vincenzini(ed.)
  11. J.Mater.Res v.14 Synthesis and Sintering of rare-earth-doped ceria powder bythe oxalate coprecipitation method K.Higashi;K.Sonoda;H.Ono;S.Sameshima;Y.Hirata https://doi.org/10.1557/JMR.1999.0127
  12. Analyt.Chem v.30 Thermal decomoposition of scandium, yttrium and rare earth metal oxalates W.W.Wendlandt https://doi.org/10.1021/ac60133a015
  13. Analyt.Chem.Acta v.24 Kinetics of decomposition of yttrium cerous and zirconyl oxalates R.P.Agrawala;M.C.Naik https://doi.org/10.1016/0003-2670(61)80027-5
  14. J.Inor.Nuel.Chem. v.23 The thermal decomposition of thorium(Ⅳ),uranium(Ⅳ)and the rare-earth metal (Ⅲ)oxalate hydrates W.W.Wendlandt;T.D.George;G.R.Horton
  15. Inorganic Thermogravimetric Analysis(2nd Ed.) C.Duval
  16. J.Inor.Nuel.Che v.27 Thermogravimetric analysis of La,Ce,Pr and Nd oxalates in air and in carbon dioxide atmosphere V.V.Subba Rao;R.V.G.Rao;A.B.Biswas https://doi.org/10.1016/0022-1902(65)80152-X
  17. J.Am.Ceram.Soc v.81 Synthesis and electrical properties of dense Ce0.9Gd0.1O1.95 ceramics K.Huang;M.Feng;J.B.Goodenough https://doi.org/10.1111/j.1151-2916.1998.tb02341.x
  18. J.Am.Ceram.Soc. v.65 Properties of the solid electrolyte gadolinia-doped ceria prepared by thermal decomposition of mixed cerium-gadolinium oxalate A.Overs;I.Riess https://doi.org/10.1111/j.1151-2916.1982.tb09938.x
  19. J.Am.Ceram.Soc v.80 Fabrication and sintering of fine yttria-doped ceria powder J.V.Herle;T.Horita;T.Kawada;N.Sakai;H.Yokokawa;M.Dokiya https://doi.org/10.1111/j.1151-2916.1997.tb02924.x
  20. Solid State Ionics v.106 Sintering behaviors of ceria and gadolinia-doped ceria H.Inaba;T.Nakajima;H.Tagawa https://doi.org/10.1016/S0167-2738(97)00496-7