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Thermal fatigue and mechanical failure are two challenging aspects of thermoelectric (TE) module design and fabrication. Among the well-known TE materials with high conversion efficiencies are various brittle semiconductors or ceramics. However, formation of microcracks during fabrication and mechanical failure due to the high stress response in the course of thermal cycles are commonly observed in...
Ge-rich Ge 1−x Pb x Te 0.5 Se 0.5 (x=0, 0.1, 0.2, 0.25, 0.3, 0.4 and 0.5) alloys with high thermoelectric performance were prepared through a conventional melting, solutioning and quenching route, followed by a spark plasma sintering technique. Se doping extends the solid solubility of Pb in GeTe. The samples maintain the rhombohedral GeTe-based solid solution...
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