Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Redistribution of an Intergranular-Liquid Phase During Sintering of 1 mol%-Al2O3-doped Calcia-Stabilized Zirconia: Estimation by Impedance Spectroscopy

  • Choi, Jung-Hae (School of Materials Science and Engineering and Center for Microstructure Science of Materials, Seoul National University) ;
  • Lee, Jong-Heun (School of Materials Science and Engineering and Center for Microstructure Science of Materials, Seoul National University) ;
  • Kim, Doh-Yeon (School of Materials Science and Engineering and Center for Microstructure Science of Materials, Seoul National University)
  • Published : 2002.01.01
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Abstract

The grain boundary resistivity of a 1-mol%-$Al_2O_3$-dopedd CaO-Stabilized Zirconia(CSZ) specimen was determined by impedance spectroscopy using sub-millimeter-scale electrodes. At the initial stage of sintering, the grain-boundary resistivity of the specimen interior was observed to be higher than that of the surface. However, upon further sintering the boundary resistivity of the specimen interior became lower than that of the surface. The results were explained in terms of a redistribution of the intergranular liquid phase. The liquid phase was predicted to initially coagulate at the interior of the specimen then spread outward during sintering.

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References

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