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.

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