High-performance Ag0.8Pb18+xSbTe20 thermoelectric bulk materials fabricated by mechanical alloying and spark plasma sintering

Abstract

Articles you may be interested inPbTe-based thermoelectric nanocomposites with reduced thermal conductivity by SiC nanodispersion Appl. Phys. Lett.Enhanced thermoelectric performance via carrier energy filtering effect in β-Zn4Sb3 alloy bulk embedded with (Bi2Te3)0.2(Sb2Te3)0.8Comparison of thermoelectric properties of p-type nanostructured bulk Si0.8Ge0.2 alloy with Si0.8Ge0.2 composites embedded with CrSi2 nano-inclusisons J. Appl. Phys. 112, 093714 (2012); 10.1063/1.4764919Enhanced thermoelectric properties in CoSb 3 -x Te x alloys prepared by mechanical alloying and spark plasma sintering

Enhancing average ZT in pristine PbSe by over-stoichiometric Pb addition

“…21,22 The p-type conductivity in PbSe is acceptable if considering following possibilities: (a) existence of Pb vacancies and holes due to deficient Pb atoms from elemental loss of Pb during the MA and SPS processes and (b) easier oxidization of Pb during the processing, providing O atoms as acceptors in PbSe. 23 Nevertheless, even for both cases, the p-n transition was not due to the Se loss during high-temperature measurements, since the same p-n transition was confirmed by cycle tests.…”

A combinatorial approach to microstructure and thermopower of bulk thermoelectric materials: the pseudo-ternary PbTe–Ag2Te–Sb2Te3 system

“…It should also be noted that the ''LAST-18'' (¼ (PbTe) 0.9 (Ag 0.5 Sb 0.5 Te) 0.1 ) composition is close to the solubility of AgSbTe 2 in the PbTe-rich rocksalt at 325 C. At this or similar compositions, nanoscale precipitation occurs 4,[17][18][19]44,45 depending on the alloy preparation conditions. In cases where the precipitates are AgSbTe 2 , 4,17 the precipitation should be a low temperature phenomenon below 325 C, and should redissolve above this temperature.…”

Influence of nanoscale Ag2Te precipitates on the thermoelectric properties of the Sn doped P-type AgSbTe2 compound

“…Therefore, optimal TE materials must feature a high PF and low thermal conductivity. 1 (LAST) [18][19][20][21] and GeTe, called tellurium antimony germanium silver (TAGS) 22,23 and have successfully exhibited enhanced TE performance.…”