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 SM ISO690:2012POPOVICH, Nicolae, SHURA, Vasile. Electrical and thermal transport properties of (TlBiS2) 1-x(2PbS)x alloys. In: Journal of Physics Condensed Matter, 2003, vol. 15, pp. 5389-5396. ISSN 0953-8984. DOI: https://doi.org/10.1088/0953-8984/15/31/306 |
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  Journal of Physics Condensed Matter |
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| Volumul 15 / 2003 / ISSN 0953-8984 /ISSNe 1361-648X | ||||||
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| DOI:https://doi.org/10.1088/0953-8984/15/31/306 | ||||||
| Pag. 5389-5396 | ||||||
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A high efficiency of thermoelectric conversion can be achieved by using materials with a maximum figure of merit Z, i.e. materials with a high Seebeck coefficient S, high electrical conductivity a and low thermal conductivity K. Investigations of transport phenomena in alloys of the (TIBiS2) 1-x(2PbS)x system have shown that in solid solutions of type (A3B5C26) 1-x (2A4B6)x cation substitution according to the scheme 2A4(+2) → A3(+1) + B5(+3) leads to a strong decrease in lattice thermal conductivity KL. In an area (X = 0.50) of the KL = f(C) curve the lattice part of the thermal conductivity of (TlBiS2)1-x(2PbS)x alloys decreases to 0.26 W m-1 K-1 which is approaching the theoretical minimum. As a result, the dependence of the thermoelectric figure of merit on composition Z = f (C) of alloys of the (TlBiS2) 1-x(2PbS)x system passes through a maximum in the area X = 0.50, exceeding by ∼25% the respective value of Z for lead sulfide at room temperature. |
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| Cuvinte-cheie Engineering controlled terms Composition, Electric conductivity, Seebeck effect, Solid solutions, thermal conductivity, Thermoelectricity Engineering uncontrolled terms Thermoelectric materials Engineering main heading Titanium alloys |
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