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Preparation and properties of porous (Ca,Mg)0.15Zr0.7O1.7 ceramics

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2011, 21(2), pp.70-74
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

김복희 1,  김상희 1,  최은실 1

1전북대학교

Accredited

ABSTRACT

(Ca,Mg)0.15Zr0.7O1.7 ceramics was investigated for the application to SOFC ceramic supporter with high porosity and mechanical strength. ZrO2 powder was prepared by combustion method with glycine using the solution of ZrO(NO3)2 ·2H2O dissolved into deionized water and calcination at 800oC. Porous (Ca,Mg)0.15Zr0.7O1.7 ceramics was prepared by sintering the mixture of prepared ZrO2 powder, dolomite and carbon black at 1200~1400oC for 1 h. The open porosity of the (Ca,Mg)0.15Zr0.7O1.7 ceramics sintered at 1300oC was over 30 % and increased linearly with the amount of carbon black. The crystal structure of (Ca,Mg)0.15Zr0.7O1.7 ceramics consisted of single cubic phase. The open pore of this ceramics was connected continuously and distributed well on the whole. This ceramics sintered at 1300oC showed the porosity from 32to 55 % and mechanical strength from 90 MPa to 30 MPa with increasing the content of added carbon black.

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This paper was written with support from the National Research Foundation of Korea.
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