Перегляд за Автор "Tavrina, T. V."
Зараз показуємо 1 - 3 з 3
Результатів на сторінці
Налаштування сортування
Документ Mechanical and Thermoelectric Properties of PbSe1-xTex Solid Solutions(Ivan Franko National University of Lviv, 2018) Vodoriz, O. S.; Tavrina, T. V.; Rogachova, O. I.The microhardness, Seebeck coefficient and electrical conductivity of PbSe1-xTex (x = 0 – 0.045) solid solutions were investigated at room temperature. In the range of small concentrations of PbTe (in the vicinity of x = 0.01 and x = 0.02) an anomalous decrease in microhardness, increase in Seebeck coefficient and electrical conductivity were registered. The concentration anomalies were interpreted as the transition from diluted to concentrated solid solutions when the interaction between impurity atoms starts to make a significant contribution to the change of the properties of materials.Документ Thermal conductivity of PbSe1-xTex (x = 0 – 0.04) solid solutions(Institute of Thermoelectricity National Academy of Sciences of Ukraine, 2020) Nikolaenko, G. O.; Vodoriz, O. S.; Rogacheva, E. I.; Tavrina, T. V.; Lisachuk, G. V.The dependence of lattice thermal conductivity λL of pressed samples of PbSe1-xTex solid solutions on the composition (x = 0 – 0.04) at a temperature of 325 K is obtained. The λL(х) curve shows a maximum near х = 0.0075. Measurement of the temperature dependence of λL in the range of 150-600 K showed that a concentration anomaly in the same range of compositions is also observed on the composition dependence of power factor β in the temperature dependence of λL . The non-monotonic character of the λL(х) and β(х) dependences is associated with critical phenomena accompanying the transition of the percolation type from dilute to concentrated solid solutions. In the study and practical application of PbSe1-xTex solid solutions, it is necessary to take into account the non monotonic nature of the change in thermal conductivity with composition. Bibl. 15, Fig. 3.Документ Thermoelectric Properties of PbSe₁₋ₓTeₓ Solid Solutions(Прикарпатський національний університет ім. Василя Стефаника, 2019) Vodoriz, O. S.; Tavrina, T. V.; Rogachova, O. I.