Enhancement of thermoelectric figure of merit by the insertion of multi-walled carbon nanotubes in α-MgAgSb

Abstract

Enhancement of thermoelectric figure of merit by the insertion of multi-Enhancement of thermoelectric figure of merit by the insertion of multi-walled Enhancement of thermoelectric figure of merit by the insertion of multi-walled carbon nanotubes in α-MgAgSb carbon nanotubes in-MgAgSb

Insight on the Interplay between Synthesis Conditions and Thermoelectric Properties of α-MgAgSb

“…We also found a small amount of dyscrasite, Ag 3 Sb, in the samples sintered at 300 °C, in addition to the other secondary phases composing the ring structures. This was not surprising, as dyscrasite is a common impurity in this system and has already been found in samples of several studies [12,13,15,20]. Some amount of γ-MgAgSb was also fitted in the samples pressed at 350 °C and 400 °C.…”

“…This method, with a slight adjustment of the stoichiometry to MgAg 0.97 Sb 0.995 , gives an average zT of 1.1 between room temperature and 300 °C, and the samples contain very few impurity phases. More attempts of tuning the composition and doping were made later and resulted in promising values for zT [14,15,16,17,18,19,20], the highest being an average of 1.2 for Ni doping on the Ag lattice site [13]. Although the material system has very promising properties, its synthesis has proven to be challenging, as evidenced by the accompanying secondary phases that are often reported.…”

“…Although the material system has very promising properties, its synthesis has proven to be challenging, as evidenced by the accompanying secondary phases that are often reported. The main impurities are dyscrasite, Ag 3 Sb [12,13,15,20,21,22,23,24] and pure antimony [12,13,14,20,21,23,24], which keep appearing in most X-ray diffraction (XRD) patterns. γ-MgAgSb [15,21,22] sometimes appears as well, but not systematically.…”

Systematic analysis of the interplay between synthesis route, microstructure, and thermoelectric performance in p-type Mg2Si0.2Sn0.8

“…Note that the SPB model and hence is in principle developed for a homogenous material and not for a material with secondary phases. On the other hand, = ( 0 , ) which both depend the microstructure of a material, even if it is single phase [69,70]. Thus, if is obtained from experimental data, it is not a "true" material parameter anymore but an effective one.…”

The structural, electronic, elastic and high thermoelectric properties of a new Zintl compound Ba<sub>3</sub>Sn<sub>3</sub>Sb<sub>4</sub> studiedby first principles

“…新合成Zintl相化合物Ba 3 Sn 3 Sb 4 的基本物理性质和热电特性. 中国科学: 物理学 力学 天文学, 2020, 50: 077302 在T=375 K时可以达到1.05 [11] ; 有研究报道单晶SnSe的 ZT值可高达~2.6 [12] , 因为材料具有超低的晶格热导率;…”