Effect of multiwalled carbon nanotubes on the thermoelectric properties of Mn-Zn ferrites

In this study, Mn-Zn ferrites with three different multiwalled carbon nanotubes (MWNTs) concentration, 1,2,3 wt%, were used to compare the effect of MWNTs on thermoelectric properties of the composites. The dimensionless figure of merit (ZT) of the composites at the low contents (1 and 2 wt%) of MWNTs have shown significantly increased values compared to those of composites at the high contents (3 wt%) in the temperature range of 323-973 K. The maximum ZT of 0.038 was obtained at 2 wt%. It is considered that the improved thermoelectric performance of the composite mainly originated from electrical conductivity that is attributed to the increased carrier concentration or carrier mobility. (C) 2017 Elsevier Masson SAS. All rights reserved.