Abstract
p-Type Bi2Te3-Sb2Te3 solid solutions were prepared by mechanical alloying (MA) and hot pressing (HP) under different process conditions, after which the transport and the thermoelectric properties were evaluated. The relative densities of all hot-pressed specimens were over 98%, and the microstructure and crystal orientation were independent of the HP direction. All specimens exhibited p-type conduction, and the electrical resistivity was observed to increase slightly with increasing temperature, indicating a degenerate semiconductor behavior. The carrier concentration decreased with increasing HP temperature while the mobility increased. The maximum figure of merit obtained was 0.86 at 323 K for Bi0.5Sb1.5Te3 hot-pressed at 648 K.
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Lee, GE., Kim, IH., Choi, SM. et al. Process controls for Bi2Te3-Sb2Te3 prepared by mechanical alloying and hot pressing. Journal of the Korean Physical Society 65, 2066–2070 (2014). https://doi.org/10.3938/jkps.65.2066
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DOI: https://doi.org/10.3938/jkps.65.2066