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Thermoelectric materials can be used to convert waste heat, such as solar energy and automobile exhaust, to electricity. A Bi0.45Sb1.55Te3 p-type cuboid was created using hydrothermal synthesis, cold pressing, and evacuated-and-encapsulated sintering in a Pyrex ampoule. The figure of merit (z) was determined by finding three transport parameters: electrical conductivity, thermopower, and thermal conductivity. The thermal conductivity measurements on the three (A, ...
Materials of β-Cu2−xSe were fabricated by using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials were then characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Thermal conductivity measurements were carried out utilizing transient plane source (TPS) techniques using a thermal constants analyzer. The thermal conductivity of β-Cu2−xSe at room temperature is found to be larger than that ...
This article examined the thermoelectric properties of Ca3CO4O9 ceramic samples that were sintered using the hybrid microwave (HMW) technique. This microwave process was found to promote densification and grain texturing in the ceramics which increased their electrical conductivity. However, the thermal conductivity was unaffected by the microstructural changes....
Using a gelation-freezing method, diatomite-derived porous silica ceramics with high porosities up to 90% were fabricated. Diatomite particles contain large numbers of meso- and micropores, intrinsically reducing the thermal conductivity. In this study, thermal conductivity of the sintered specimens was measured. Results indicate that ceramics had a low thermal conductivity due to their very high porosity....
