Перегляд інформації про документ
Назва:
Peculiarities of concentration dependences of thermal conductivity in (PbTe) 1-x (Bi 2 Te 3 ) x semiconductor solid solutions
Колекція:
Статті »
Видавець:
nstitute of Thermoelectricity, Acad emy of Sciences and Ministry of Education and Science of Ukraine
Рік публікації:
ISBN/ISSN:
Вид документа:
стаття
Мова документа:
англійська
Додано у архів:
29.09.2015
Зведена інформація по документу:
Rogacheva, E.I. Peculiarities of concentration dependences of thermal conductivity in (PbTe) 1-x (Bi 2 Te 3 ) x semiconductor solid solutions [Текст] / Rogacheva E.I., Vodorez O.S., Nashchekina O.N., Dresselhaus M.S. // Статті : - nstitute of Thermoelectricity, Acad emy of Sciences and Ministry of Education and Science of Ukraine, 2014.
Постійне посилання:
Коротке посилання на файл:
Аанотація:

вiдсутня

отсутствует

For the semiconductor (PbTe)1-x (Bi2Te3)x solid solutions, the temperature (T = 250 – 670 K) and concentration (x = 0 – 0.07) dependences of the total  and lattice p thermal conductivities were obtained. It was established that the dependences (x), p(x) and β(x) (where β is the exponent in the p ~ T -β dependence) have a non-monotonic dependence on x in this range of x. While showing a general tendency to decrease with increasing x, the three variables , p, and β exhibit maxima at x = 0.005, 0.015 and x = 0.03. The oscillatory character of these dependences is attributable to the changes in thermal transfer processes and the mechanisms of phonon scattering under transitions from the dilute to the concentrated and associated solid solutions, with the transitions due to spatial ordering processes. The effective cross-section σs for phonon scattering by impurity atoms was estimated on the basis of the experimental data and theoretical calculations in accordance with the Klemens theory. The mean σs value in the homogeneity region of PbTe (x = 0 – 0.05) found experimentally coincides with the theoretically calculated σs value. However, in the region of the dilute solid solutions (x < 0.005), the σs value considerably exceeds the mean σs value. Also long-term aging reduces  by ~ 15%.


© 2018 — Розроблено лабораторією інформаційно-пошукових систем НТУ "ХПІ"

Яндекс.Метрика