Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Reaction Conditions on the Particle Properties for Synthesis of Stabilized Zirconia by Modified Oxalate Method

  • Park, Hyun-wook (Optic and Display Material Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Young Jin (Optic and Display Material Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Jin-Ho (Optic and Display Material Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Jeon, Dae-Woo (Optic and Display Material Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Hwang, Hae Jin (Department of Materials science and Engineering, Inha University) ;
  • Lee, Mi Jai (Optic and Display Material Center, Korea Institute of Ceramic Engineering and Technology)
  • Received : 2016.06.07
  • Accepted : 2016.08.23
  • Published : 2016.09.30
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Abstract

Nanocrystalline powder of zirconia stabilized with 8 mol% yttria (YSZ) has been synthesized through oxalate process using $ZrOCl_2{\cdot}8H_2O$ and $Y(NO_3)_3{\cdot}6H_2O$ as starting materials. Understanding of the characteristic changes of YSZ powder as a function of processing conditions is crucial in developing dense and porous microstructures required for fuel cell applications. In this research, microstructure change, surface area, particle shape and particle size were measured as a function of different processing conditions such as calcination temperature, stirring speed and concentration of starting materials. The resultant crystallite sizes were calculated by XRD-LB (X-Ray Diffraction Line-Broadening) method, BET method, and morphology of the crystal was observed in TEM and FE-SEM. The TEM examination showed that the powder synthesized with 0.7 M of YSZ concentration had a spherical morphology with sizes ranging from 20 to 40 nm. However, the powder was gradually aggregated above 1.0 M of YSZ concentration with the aggregation being intensified as the YSZ concentration was increased.

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References

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