Thermal conductivity of new nanocomposite superionic semiconductors K0.01Cu1.96S, K0.02Cu1.95S, K0.03Cu1.94S, K0.04Cu1.93S, K0.05Cu1.94S
| Autor: | M.M. Kubenova, M.Kh. Balapanov, R.Kh. Ishembetov, K.A. Kuterbekov, R.F. Almukhametov, K.Zh. Bekmyrza, A.M. Kabyshev, R.Sh. Palymbetov, L.U. Taimuratova |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Eurasian Journal of Physics and Functional Materials, Vol 7, Iss 3, Pp 197-206 (2023) |
| Druh dokumentu: | article |
| ISSN: | 2522-9869 2616-8537 |
| DOI: | 10.32523/ejpfm.2023070307 |
| Popis: | In this work, we investigated the effect of nanostructuring on the thermoelectric and thermal properties of nonstoichiometric solid splavs doped with copper sulfides with potassium. The synthesized alloys K0.01Cu1.96S , K0.02Cu1.95S , K0.03Cu1.94S , K0.04Cu1.93S , K0.05Cu1.94S are nanocomposite. The crystallite sizes of the synthesized powder, as estimated from the half-width of X-ray diffraction lines, range from 7 to 180 nm. Sample K0.01Cu1.96S is a mixture of phases consisting of chalcocite Cu2S (82%), jarleite Cu1.96S (12%), anilite Cu1.75S (6%). The composition of samples K0.02Cu1.95S and K0.03Cu1.94S includes the most common phases of copper sulfides - chalcocite Cu2S , jarleite Cu1.96S, digenite Cu1.80S . Samples K0.04Cu1.93S and K0.05Cu1.94S consist of jarleite Cu1.96S , digenite Cu1.80S and potassium copper sulfide KCu4S3 phases. In a practical sense, the extremely low thermal conductivity values (from 0.16 to 0.80 W/m · K) found in the range of 300–700 K for nanocomposite samples K0.02Cu1.95S and K0.03Cu1.94S are very favorable for achieving high thermoelectric figure of merit ZT material. |
| Databáze: | Directory of Open Access Journals |
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