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Hydrothermal methods were used to synthesize nanoplatelets of Bi2-xSbxTe3. In this article, the electrical conductivity, thermopower, and thermal conductivity were the temperature-dependent transport parameters that were determined to calculate the dimensionless figure of merit, ZT. The thermal conductivity measurements were carried out using the transient plane source (TPS) technique with the thermal constants analyzer. The alloy had a low thermal ...
Nanostructured SnSe was created using hydrothermal methods and sintering in an evacuated-and-encapsulated ampoule. The effects of the synthesis and thermoelectric properties of SnSe using hydrothermal synthesis at low temperatures followed by evacuating-and-encapsulating sintering were then further investigated to determine their viability. One of the investigations centered around determining the thermal conductivities of the samples. The anisotropy of the thermal conductivity of the pressed polycrystalline SnSe was measured using the transient ...
This article presented the high temperature properties of high-entropy alloys (HEAs) that will potentially be used as thermoelectric (TE) generator materials. The high temperature thermal conductivity was analyzed using the transient plane source (TPS) method through the use of a Thermal Constant Analyser. From the experimental results, it was concluded that HEAs may be used as high-performance bulk TE materials at high temperatures due to their potential to reach low ...
Tetrahedrite is a naturally occurring mineral, possessing a high figure of merit (ZT), used to evaluate the efficiency of thermoelectric (TE) materials. Phase stability and thermoelectric properties of single phase nanocrystalline Zn-doped tetrahedrite was studied. Thermal conductivity was directly measured using a transient plane source technique. It was observed that Zn, and other transition metals, reduced the thermal conductivity significantly due to increased phonon scattering....
Research has been focused on the Co-based thermoelectric family since the discovery of thermoelectric properties in NaCo₂O₄ ceramics. The formation of strong grain boundaries has been achieved in several ceramic materials through the addition of metallic Ag, forming the liquid phase. In the case of Ca₃Co₄O₉ ceramic materials, it is essential to find a comparable additive. In this study, K₂CO₃ is analyzed as liquid phase promoter ...
