| Mo的掺杂对Ce0.8Gd0.2O1.9烧结温度及电性能的影响 |
| Effects of Mo-dopant on Sintering and Grain Boundary Conductivity of Ce0.8Gd0.2O1.9 |
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| 摘要: |
| 关键词: 固体电解质 电导率 晶界 掺杂 |
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| Abstract: Ce0.8Gd0.2O1.9 ceramics were synthesized by sol-gel method and the effect of MoO3 addition on the sintering temperature, microstructure and electrical properties was examined. The structures and ionic conductivities were characterized by TG/DTA, XRD, field-emission scanning electron microscopy (FE-SEM) and electrochemical impedance spectroscopy (EIS). The results showed that Mo-doped ceramics exhibited viscous flow, which reduces friction of the particles, promots mass diffusivity of the matrix grain boundary mobility, and thus enhances further densification during subsequent sintering. The conductivities of grain boundary and grain interior increased with the decreasing of the grain boundary resistance. With Mo-dopant, the grain interior conductivity increased from 1.27×10-3 S·cm-1 to 5.46×10-3 S·cm-1, and the grain boundary conductivity increased from 1.02×10-3 S·cm-1 to 2.89×10-3 S·cm-1 at 600 ℃ for Ce0.8Gd0.2O1.9. |
| Keywords: solid state electrolyte conductivity grain boundary doping |
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| 周德凤,夏燕杰,梁 鹏,孟 健.Mo的掺杂对Ce0.8Gd0.2O1.9烧结温度及电性能的影响[J].无机化学学报,2008,24(2):324-328. |
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