Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

The Effect of Porosity Sealing by Sol-gel Method on Physical and Electrical )Properties of a Plasma Sprayed $Ce_0.8Gd_0.2O_2$ Electrolyte

졸-겔법에 의한 기공 충전이 플라즈마 용사된 $Ce_0.8Gd_0.2O_2$ 전해질체의 물리 및 전기적 성질에 미치는 영향

  • 유석원 (고려대학교 재료공학과) ;
  • 김장엽 (고려대학교 공학기술연구소) ;
  • 김호무 (고려대학교 재료공학과) ;
  • 김병호 (고려대학교 재료공학과) ;
  • 임대순 (고려대학교 재료공학과)
  • Published : 1999.11.01

Abstract

Ceria based electrolytes were fabricated by a plasma spraying method. The porosity which was crated during the plasma spraying process was infiltrated with Ce0.8Gd0.2O2 sol by ultrasonic treatment and heat treatment at 90$0^{\circ}C$ in order to improve physical and electrical properties. The porosity decreased from 9.8% to 6.5% and gas permeability at 80$0^{\circ}C$ decreased from 16.7$\times$10-3 to 5.7$\times$10-3 cm3(STP)/cm2.s.cmHg as the number of treatment increased 10 cycles. The ionic conductivity was also increased about 30% after 10 times of sealing.

Keywords

File

Download PDF

References

  1. J. Appl. Electrochem v.2 no.97-104 High Oxide Conduction in Sintered Bi₂O₃ Containing SiO,CaO, or La₂O₃ T. Takahashi;H. Iwahara;Y. Nagai
  2. J. Electrochem. Soc. v.120 no.1230-1237 The Electrical Conductivity of CaO-Doped Nonstoichiometric Cerium Oxide from 700 to 1500℃ R.N. Blumenthal;F.S. Brugner;J.E. Garmer
  3. Proc. of the 7th Thermal Spray Conf. Correlation between Spraying Conditions and Microstructure for Alumina Coatings Produced by HVOF and VPS D.A.J. Ramm;T.W. Clyne
  4. Solid State Ionics v.28-30 no.1766-1769 Plasma-Sprayed Zirconia Electrolytes M. Scagliotti;F. Parmigiani;G. Chiodelli;A. Magistris;G. Samoggia;G. Lanzi
  5. J. Am. Ceram. Soc. v.74 no.3 Plasma Spraying of Porous Electrodes for a Planar Solid Oxide Fuel Cell L.W. Tai;P.A. Lessing
  6. Thin Solid Films v.118 no.421-435 Metallic and Ceramic Powders for Vacuum Plasma Coating H. Eschnauer;E. Lugcheider
  7. Acta metall. Mater. v.38 no.11 Modelling of the Temperature and Velocity of Ceramic Powder Particles in Plasma Frame-II Zirconia D.K. Das;R. Sivakumai
  8. 요업학회지 v.35 no.6 알루미나 첨가가 플라즈마 용사된 세리아계 전해질체 코팅층의 미세구조 및 기계적 특성에 미치는 영향 김장엽;유석원;임대순
  9. 고려대 재료공학과 대학원 박사학위 논문 알루미나 첨가가 기공 충전이 플라즈마 용사된 세리아계 전해질체의 기계적 및 전기적 특성에 미치는 영향 김장엽
  10. J. Am. Ceram. Soc. v.69 no.9 Grain-Boundary Effect in Ceria Doped with Trivalent Cations. I. Electrical Measurements R. Gerhardt;A.S. Nowick
  11. Solid State Ionics v.40 no.41 Relationships Between The Gas Permeabilities and The Microstructures of Plasma Sprayed Oxide Layers Y. Kaga;Y. Ohno;K. Tsukamoto;F. Uchiyama
  12. J. Membrane Science v.105 no.89-101 Effects of Temperature and Pressure on Gas Permselection Properties in Asymmertric Membrane D. Wang;K. Li;W.K. Teo
  13. J. Am. Ceram. Soc. v.69 no.9 Grain-Boundary Effect in Ceria Doped with Trivalent Cations: I. Electrical Measurements R. Gerhardt;A.S. Nowick