Issues and opportunities from Peltier effect in functionally-graded colusites: From SPS temperature modeling to enhanced thermoelectric performances

Flash spark plasma sintering of zirconia nanoparticles: Electro-thermal-mechanical-microstructural simulation and scalability solutions

“…In particular, a thin black zone is present at mid height. A similar distribution has been observed by simulation the Peltier effect in SPS of colusite sulfur thermoelectric specimens [70]. The latter generates local temperature maximums by the coupling of the thermoelectric flux [66] and the thermal contact resistance.…”

Insight into the preponderant role of the lattice size in Sn-based colusites for promoting a high power factor

“…Indeed, the lattice ranges in colusite are broad and likely vary from a z 10.74-10.90 Å. 47,48,[50][51][52]55,[59][60][61] Such dilatation/contraction of the lattice can be rst provided by the substitution/doping of an impurity element like, for example, Cr in the present study. However, in sulphidebased materials, a certain exibility in the lattice is also commonly observed which is mainly related to the sulfur offstoichiometry unavoidable in most of the process approaches due to the high vapour pressure of the sulphur element.…”

“…[47][48][49] The colusite compound family has been extensively investigated within the last 8 years for its promising performance, currently achieving the symbolic unity value of zT, ranking it as one of the best TE sulde materials. Among the preliminary steps to achieve this good performance, the major roles of the synthesis approaches, 48,50,51 pristine composition, 47,52-54 doping, 50,[55][56][57][58] and defect chemistry 48,54,59 have been reported and systematically correlated to their inuences on the intrinsic crystal, electronic and vibrational structures of the material. This deep understanding of the structure/property relationship in the colusite structure-type enabled the possibility of controlling its native versatile transport properties and building a pathway towards the application stage.…”

Superior thermoelectric properties of ternary chalcogenides CsAg5Q3 (Q = Te, Se) predicted using first-principles calculations

“…Thermoelectric materials (TEMs) have been attracting great interest in direct conversion of thermal energy into electricity, enabling power generation from a feeble heat source like waste heat. 1–5 This power generation can be of help to mitigate the global challenge of energy shortage and to promote sustainable development of the human society. 6 As is well-known, the power conversion efficiency of TEMs is defined by a thermoelectric figure of merit ZT = S 2 σT /( κ l + κ e ), 7 where S , σ , κ l ( κ e ) and T are the Seebeck coefficient, electrical conductivity, lattice (electron) thermal conductivity and absolute temperature, respectively.…”