On the effect of carbon nanotubes on the thermoelectric properties of n-Bi2Te2.4Se0.6 made by mechanical alloying
作者： Quentin Lognoné , Franck Gascoin
DOI: 10.1016/J.JALLCOM.2015.02.055
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摘要: Abstract Composite materials based on n-Bi 2 Te 2.4 Se 0.6 with commercial multi walled carbon nanotubes (MWCNTs) have been synthesized via high energy ball milling and spark plasma sintering. The effect the transport properties of presence MWCNTs during billing step is studied. It demonstrated that MWCNTs, even in small quantity, change dramatically properties. Seebeck coefficient, electrical resistivity, thermal diffusivity carrier concentration are measured their variation discussed. discussed as it clearly induces three competing effects, tellurium vacancy, decreased grain size Bi either promoted or result a prevented growth sintering n-type doping. large caused by represents an alternative way tuning
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