Effects of Ag doping on thermoelectric properties of Zn4Sb3 at low temperatures

Optimizing thermoelectric performance of Cd-doped β-Zn4Sb3 through self-adjusting carrier concentration

“…The gradual increase in thermal conductivity is mainly ascribed to the increase of electronic contribution. The electronic contribution to thermal transport can be estimated by WiedemanneFranz relation k e ¼ LsT, where L is Lorenz number [42]. The L value is calculated based on the SPB model and the value of Seebeck coefficients, and the room temperature L values are listed in Table 1.…”

Enhanced thermoelectric properties of iron doped compound (Zn1−xFex)4Sb3

“…The study on thermoelectric properties of Ag-doped compounds (Zn 1 À x Ag x ) 4 Sb 3 [27] performed by present authors indicate that Ag atoms occupy preferentially the Zn vacancies in normal sites, and then Ag atoms will substitute for interstitial Zn atoms. The same phenomenon may happen in Fe-doped compounds.…”

Thermoelectric properties of nanostructured FeSi2 prepared by field-activated and pressure-assisted reactive sintering

“…The addition of Cu promoted the phase transformation so that FeSi 2 Cu 0.1 formed in the ␤-FeSi 2 structure in a 4-h anneal. During the transformation of ␣ + → ␤, the stacking faults provide drag resistance and the addition of Cu is likely to decrease the stacking fault energy and enhance the formation rate of the ␤-phase subsequently [7,8]. In the work by Chen et al [2], annealing the powders prior to uniaxial hot-pressing was found to aid in the transformation to the ␤-phase and to the control of grain growth.…”

“…Investigations have been made during the past decade to improve the TE properties of the silicide by doping optimization and microstructural modifications [2,[5][6][7][8][9]. Doping of ␤-FeSi 2 with metals, such as Co and Mn to produce n-type and p-type materials, respectively, is aimed at improving the Seebeck coefficient and electrical conductivity [6,9], Desimonia's results indicated that addition of Al improved the stabilization of ␤-FeSi 2 phase and reducing the amount of -FeSi from 20 to 6%.…”