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Information × Registration Number 0215U004965, 0115U005812 , R & D reports Title Thermoelectric Materials and Devices for Energy Saving and Security Encrease popup.stage_title Head Lyubomyr Nykyruy, Кандидат фізико-математичних наук Registration Date 23-12-2015 Organization Centre of distance learning and knowledge control of Precerpathian national University named after V.Stefanyk popup.description2 It was development technology of the conductive nano-channels around PbTe grains. The introduction of colloidal Ag nanoparticles (size ~ 50 nm) not only reduces the thermal conductivity ((0.06-0.2) W/(m·K)) caused by scattering of medium-wave phonons, but also increases the Seebeck coefficient (340 microV/K) after additional throttling of electrons on barriers of the Silver nanoparticles. The introduction of nanodisperse ZnO leads to the increase of Seebeck coefficient in 2-3 times and leads to monotonic decrease of thermal conductivity. The result figure of merit of this thermoelectric material ZT = 1.38 at 0.5 at.% ZnO. For PbTe (ZnO) were obtained the significantly higher values of Seebeck coefficient (430-500 microV / K) in compare to PbTe(Ag). This increase of Seebeck coefficient is explained throttling of high energy carriers through the barriers on the grain boundaries. It was found high values of dimensionless thermoelectric figure of merit: ZT = 1 for PbTe:Sb (0,3 ат.%), аnd Pb18Ag2Te20 in the temperature range (450-550) К, and values ZT = (1.5-2.0) for Pb18Ag1Sb1Te20 in the temperature range (500-600) К. Thermoelectric efficiency of other materials in the studied temperature range is significantly lower. The high values of ZT explained by reduction of thermal conductivity, resulting in the creation of a significant number of phonon scattering centers for Pb18Ag1Sb1Te20 and Pb18Ag2Te20. Product Description popup.authors Биліна Іван Сергійович Возняк Орест Михайлович Волочанська Богдана Петрівна Горічок Ігор Володимирович Григорук Ірина Іванівна Гургула Галина Ярославівна Дзумедзей Роман Олексійович Дзундза Богдан Степанович Загороднюк Андрій Васильович Калька Оксана Петрівна Костюк Оксана Богданівна Ліщинський Ігор Мирославович Маковишин Володимир Ігорович Прокопів Володимир Васильович Рувінський Марк Аунович Салій Ярослав Петрович Семко Тарас Олегович Яворський Ярослав Святославович popup.nrat_date 2020-04-02 Close