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Enhanced thermoelectric properties in vacuum-annealed Bi0.5Sb1.5Te3 thin films fabricated using pulsed laser deposition
(2019)
Localized cooling in microelectronics and nanoelectronics as well as energy autonomy in applications such as wireless sensor networks and wearable electronics could be well served by thin-film thermoelectric devices ...
High thermoelectric performance of Bi2-xSbxTe3 bulk alloys prepared from non-nanostructured starting powders
(2019)
In this work, hot press and hot deformation were applied to p-type Bi2-xSbxTe3 (x = 1.5-1.8) starting powders that have not undergone nanostructuring processing. The effects of hot pressing and hot deformation, as well ...
Thermoelectric properties of highly efficient Bi-doped Mg2Si1−x−ySnxGey materials
(2014)
In this work, Bi-doped Mg2Si1−x−ySnxGey (x=0.4 and y=0.05) solid solutions with the nominal Bi content of 0⩽z⩽0.035 were synthesized by solid state synthesis and sintering via hot pressing, and were studied in terms of ...
Low temperature synthesis and characterization of PbTe-based materials
(Affiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, 1678 Nicosia, CyprusCorrespondence Address: Papageorgiou, C.Department of Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, 1678 Nicosia, Cyprus, 2012)
In the present work, PbTe and PbTe with Pb precipitates have been synthesized by low temperature synthesis. Selected materials were ball milled in order to explore the potential of this processing. The initial materials ...
Influence of processing conditions on the thermoelectric properties of La1-xSrxCoO3 (x=0, 0.05)
(Affiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, 1678 Nicosia, CyprusCorrespondence Address: Papageorgiou, C.Department of Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, 1678 Nicosia, Cyprus, 2012)
La1-xSrxCoO3 (x=0, 0.05) powders were prepared using the citrate-gel (Pechini) process. Pellets formed from these powders were sintered at various temperatures. All samples were characterized by means of X-Ray Diffraction ...
Effect of antimony-doping and germanium on the highly efficient thermoelectric Si-rich-Mg2(Si,Sn,Ge) materials
(2017)
Two series of materials (a) Mg2Si0.55-ySn0.4Ge0.05Sby, 0 ≤ y ≤ 0.0175 and (b) Mg2Si0.5875-xSn0.4GexSb0.0125, 0 ≤ x ≤ 0.20 have been developed and studied in terms of structural features and thermoelectric properties/performance. ...
Effect of silicon nitride/oxide on the structure and the thermal conductivity of CoSi nanocomposites
(2017)
In this work, the fabrication of nanocomposites with silicon nitride/oxide into the thermoelectric matrix of cobalt silicide is presented. The different concentrations of nano-Si3N4 were intentionally introduced by mechanical ...
Structural Characterization and Thermoelectric Properties of Hot-Pressed CoSi Nanocomposites
(2014)
Fabrication of nanocomposites by introduction of SiO2 metal oxide nanoparticles into a cobalt silicide thermoelectric matrix is studied. The CoSi matrix material was prepared through solid-state synthesis, and the nano-SiO2 ...
Low-temperature synthesis and thermoelectric properties of n-type PbTe
(2013)
n-Type PbTe compounds were synthesized at temperatures as low as 430 C. After synthesis, the materials were ground, cold pressed and sintered at 600 C. The effect of this low-temperature synthesis on the structural features ...
Thermoelectric properties of Bi0.5Sb1.5Te3 thin films grown by pulsed laser deposition
(2015)
We report on the pulsed laser deposition of p-type Bi0.5Sb1.5Te3 thin films onto fused silica substrates by ablation of dense targets of Bi0.5Sb1.5Te3 with an excess of 1 wt% Te. We investigated the effect of film thickness, ...