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Information × Registration Number 0214U000294, 0113U004552 , R & D reports Title Low-dimensional and bulk nanocomposite materials for thermoelectric energy conversion popup.stage_title Head Rogacheva Elena, Доктор фізико-математичних наук Registration Date 06-02-2014 Organization The Kharkov state polytechnical university popup.description2 Polycrystalline samples of undoped and doped PbTe, compounds SnTe, GeTe, Bi2Te3 stoichiometric composition and with different degree of deviation from stoichiometry, solid solutions Bi1-xSbx, Bi2Te3-Sb2Te3, PbTe-SnTe, PbTe-PbSe, PbTe-Bi2Te3, PbTe-Sb2Te3, composite structures based on IV-VI compounds and Bi2Te3 were prepared. Attestation samples were conducted: the chemical composition, the homogeneity degree and crystal structure were investigated, measuring microhardness, galvanomagnetic, thermoelectric and thermal properties in the temperature range were conducted. It is established that physical properties dependencies of solid solution were nonmonotonic character - concentration anomalies of heat capacity, electroconductivity, carrier charge mobility and thermal conductivity were detected. Presence of anomalies attributed with critical phenomena that accompany the transition from diluted to concentrated and associated solid solutions, with electronic phase transitions (transition to the gapless state, semimetal-semiconductor). The oscillatory character of properties isotherms that indicates the presence of intermediate states in the system with different types of spatial correlations was detected. The obtained crystals will be used for a receipt from them of low-dimensional and three-dimensional nanocomposite materials for thermoelectric energy conversion. Product Description popup.authors Будник Олександр Валентинович Водоріз Ольга Станіславівна Дорошенко Ганна Миколаївна Ніколаєнко Ганна Олександрівна Нащекіна Ольга Миколаївна Ольховська Світлана Іванівна Рогачова Олена Іванівна Сіпатов Олександр Юрійович popup.nrat_date 2020-04-02 Close