| Redistribution of an Intergranular-Liquid Phase During Sintering of 1 mol%-Al2O3-doped Calcia-Stabilized Zirconia: Estimation by Impedance Spectroscopy |
| Jung-Hae Choi, Jong-Heun Lee, Doh-Yeon Kim |
| School of Materials Science and Engineering and Center for Microstructure Science of Materials, Seoul National University |
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| ABSTRACT |
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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. |
| Key words:
$Al_2O_3$-doped CSZ, Sintering, Redistribution of liquid phase, Impedance spectroscopy, Grain boundary resistivity |
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