Electrophysical and thermal properties of NaxCu2-xS (x = 0.05, 0.075, 0.10) and Na0.125Cu1.75S semiconductor alloys

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Kubenova, M.M.^1 ; Kuterbekov, K.A.^1 ; Abseitov, E.T.^1 ; Kabyshev, A.M.^1 ; Kozlovskiy, A.^1 ; Nurakov, S.N.^1 ; Ishembetov, R.K.^2 ; Balapanov, M.K.^2

L.N. Gumilyov Eurasian National University, 2 Satbayev st., Astana

010008, Kazakhstan^1

Bashkir State University, 32 Z. Validi st., Ufa

450001, Russia^2

关键词: Electronic conductivity;    Measurements of;    Nanocrystallines;    Semiconducting alloys;    Temperature intervals;    Three phasis;    X-ray phase analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012031/pdf
DOI  :  10.1088/1757-899X/447/1/012031

来源: IOP

【 摘 要 】

The results of measurements of electronic conductivity and the Seebeck coefficient, as well as X-ray phase analysis, electron microscopy, differential scanning calorimetry (DSC) and studies of the heat capacity of nanocrystalline NaxCu2-xS (x = 0.05, 0.075, 0.10) and Na0.125Cu1.75S semiconducting alloys in the temperature interval of 300 - 600 K are presented. At ambient temperature, the alloys under study consist of three phases: monoclinic Na2Cu4S3, hexagonal Chalcocite Cu2S and rhombohedral digenite Cu9S5. Measurements show that the Seebeck coefficient increases, and the conductivity decreases with increasing sodium concentration in the alloys. Thermal effects near the temperatures of 360 K, 450 K and 640 K have been observed by the DSC method.