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dc.contributor.author | Sakhabayeva, S.M. | |
dc.contributor.author | Balapanov, M.Kh. | |
dc.contributor.author | Kuterbekov, K.A. | |
dc.contributor.author | Ishembetov, R.Kh. | |
dc.contributor.author | Kubenova, M.M. | |
dc.contributor.author | Giniyatova, Sh.G. | |
dc.contributor.author | Nurkenov, S.A. | |
dc.contributor.author | Akhmetgaliev, B.M. | |
dc.contributor.author | Zeleev, M.Kh. | |
dc.contributor.author | Yakshibaev, R.A. | |
dc.contributor.author | Seisenbayeva, G.S. | |
dc.date.accessioned | 2023-12-06T06:49:33Z | |
dc.date.available | 2023-12-06T06:49:33Z | |
dc.date.issued | 2022 | |
dc.identifier.uri | http://rep.enu.kz/handle/enu/10881 | |
dc.description.abstract | Superionic semiconductor chalcogenides with mixed electronic-ionic conductivity have very low lattice thermal conductivity and are excellent thermoelectrics. Doping with other elements is one of the methods for optimizing the useful properties of a material. In this work, nanosized polycrystalline alloys of nonstoichiometric Cu1.85S copper sulfide with a low content of potassium are studied. The paper presents the results of X-ray phase analysis, differential thermal analysis (DTA) and electron microscopy of differential thermal analysis of KxCu1.85S alloys. The resulting alloys are a mixture of phases, in which the main share is djurleite - non-stoichiometric copper sulfide of the composition Cu1.97÷1.93S , in addition, depending on the composition of the alloy, there are impurities of monoclinic and hexagonal chalcocite Cu2S , roxbyite Cu1.81S , anilite Cu1.75S , traces of metallic copper. All alloys contain inclusions of Cu2O copper oxide. DTA detected a superionic phase transition from an ordered low-symmetry djurleite phase to a disordered superionic hexagonal phase of copper sulfide at about 373-383 K. In addition, DTA revealed two thermal effects at about 433 K and 460 K, which are absent in binary copper sulfide. The reason for the effects may be the redistribution of impurity potassium ions in the copper sulfide lattice. | ru |
dc.language.iso | en | ru |
dc.relation.ispartofseries | Vol.6(1);71-84 | |
dc.subject | nanocrystalline copper sulfides | ru |
dc.subject | X-ray phase analysis | ru |
dc.subject | differential thermal analysis | ru |
dc.subject | djurleite | ru |
dc.subject | superionic chalcogenides | ru |
dc.subject | phase transition | ru |
dc.title | Synthesis, X-ray phase analysis and differential thermal analysis of nanocrystalline superionic KxCu1.85S (x<0.05) copper sulfides | ru |
dc.type | Article | ru |