Flash sintering of 3YSZ doping with CNT at low temperature
In the present study,3 mol%Yttria-Stabilized Zirconia(3YSZ)powder was used as the base material doping with conductive phase-carbon nanotubes(CNT)to conduct low-temperature sintering at 200℃,and simultaneously assisting AC electric field and pressure.The effects of carbon nanotube concentration on the phase composition,microscopic morphology and ionic conductivity of sintered materials were mainly discussed.The results showed that the composites were sintered uniformly and densely at this temperature,and the ionic conductivity was 0.20 μs/cm when the concentration of carbon nanotubes was 2%;When the concentration of carbon nanotubes was 3%,the ionic conductivity 0.83 μs/cm could be reached;When the concentration of carbon nanotubes was increased to 4%,the ability of the material to withstand electric field strength and current density was further improved,and the initial voltage of flash sintering was reduced,but the conductivity was 0.6 μs/cm at this time,meantime,the material could be sintered at room temperature.
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