Capacitance at ambient temperature and microstructure of platinum/yttria-stabilized zirconia composites
作者： M.G.H.M. Hendriks , W.E. van Zyl , J.E. ten Elshof , H. Verweij
DOI: 10.1016/S0025-5408(01)00718-8
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摘要: The influence of microstructure on the capacitive behavior in dual-phase composite system platinum/cubic-yttria-stabilized zirconia (YSZ) was studied at ambient temperature. Three different synthesis methods were employed. volume fraction Pt metal varied between 0 and 25 vol%. resulting composites characterized by scanning electron microscopy (SEM) electrical impedance spectroscopy (EIS). bulk capacity increased with content. Depending method, differences microstructural homogeneity observed SEM. However, for samples prepared via routes similar fractions metallic Pt, no significant observed. A maximum increase approximately 12.6 compared to pure cubic yttria-stabilized obtained a containing vol% platinum, sol-gel method. percolation threshold platinum phase estimated from fit experimental data normalized theory found be 31.1 ± 1.5
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