PHYSICOCHEMICAL STUDY OF THE SYSTEM BI2SE3-SMSBSE3
Abstract
The chemical interaction in the Bi2Se3-SmSbSe3 system is investigated by the methods of physicochemical analysis (DTA, XRD, MSA, microhardness measurement and density determination), a state diagram is constructed.
As a result, it was revealed that the state diagram of the system belongs to the quasi-binary eutectic type. In the Bi2Se3-SmSbSe3 system in a 1: 1 ratio of components, one triple compound of the composition SmSb1,5Bi1,5Se6 melting congruently at a temperature of 1150K is formed. According to the results of X-ray phase analysis, it was found that the SmSb1,5Bi1,5Se6 compound crystallizes in the tetragonal system with lattice parameters: a = 20.03 Å, c = 13.85 Å, z = 3, density ρpicn = 7.25 g/сm3, ρrent = 7 , 33 g/сm 3.
On the basis of Bi2Se3, a region of solid solutions wыas found, which reach 6 mol% SmSb1,5Bi1,5Se6.
In the Bi2Se3-SmSbSe3 system, a continuous series of solid solutions was found in the concentration range 050 mol% Bi2Se3 (SmSbSe3- SmSb1,5Bi1,5Se6).
Compounds Bi2Se3 and SmSb1,5Bi1,5Se6 form a eutectic with a composition of 20 mol% Bi2Se3 at a temperature of 800K.
References
2.Abrikasov N.Kh., Bankina V.F., Poretskaya L.V. "Semiconductor chalcogenides and alloys based on them." M .: Science. -1975.-220s.
3. Kristie, J. Koski et. al. Chemical Intercalation of Zerovalent Metals into 2D Layered Bi2Se3 Nanoribbons // Journal of the American Chemical Society. - 2012. - Vol. 134. –P. 13773-13779. https://doi.org/10.1021/ja304925t
4. Sadigov F.M., Gambarova G.T., Ismailov Z.I., Ilyasly T.M. Electrophysical properties of solutions based on Bi2Se3 // Kinetics of crystallization mechanism: abstracts of documents VIII Int. scientific. conf. - Ivanova. - 2014 .-- p. 65-66. http://crystal.isc-ras.ru
5. Ganbarova G.T., Sadigov F.M., Ilyasly T.M., Ismailov Z.I. Electrophysical properties of solid solutions based on Bi2Se3 / Kinetics and crystallization mechanism / Abstracts VIII Int. Sci. Conf., Ivanovo. Russia. -2014.- p.65-66
6. Nikifonov V.N., Morozkin A.V., Irkhin V.Yu. Thermoelectric properties of rare earth alloys. / Physics of metals and materials science.-2013.t.4 (8) .- p. 711-720
7.Kulbachinsky, V.A., Kytin, V.G., Kudryashov A.A., Tarasov P.M. Thermoelectric properties of Bi 2Te 3, Sb 2Te 3 and Bi 2Se single crystals 3 with magnetic impurities. / Journal of Solid State Chemistry, 2012, vol. - 193 .-- p. 47-52. https://doi.org/10.1016 / j.jssc.2012.03.042
8.Lyakishev N.P. "State diagrams of double metal systems", Handbook, M .:Mechanical engineering - 1996, Volume 3.- 435 p.
9. Novoselova A. V., Lazarev V. B. Physicochemical properties of semiconductors of substances, Handbook. M.: Science. - 1979.- 340s.
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