caa a22 4500 463189299 CHVBK 20180406164904.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10973-006-7925-3 doi (NATIONALLICENCE)springer-10.1007/s10973-006-7925-3 Drebushchak V. Institute of Geology and Mineralogy SB RAS, Pr. Ac. Koptyuga 3, 630090, Novosibirsk, Russia aut Calibration coefficient of a heat flow DSC [Elektronische Daten] Part III. Electromotive force of a thermocouple as a function of temperature [V. Drebushchak] Thermodynamic model for the quantitative description of the electromotive force in a thermocouple has been developed. Thermodynamic equilibrium was applied to the system of electrons in two metals in a contact, contrary to the consideration of the dynamics of electrons in a metal under external temperature gradient in the previous classical (Drude) and quantum (Sommerfeld) approaches. The new model has two parameters, the ‘universal' sensitivity ɛ0 and the characteristic temperature of a particular thermocouple Θv, and quite simple expression for the emf ΔU=ɛ0(T−Θvln(1+T/Θv) and sensitivity ɛ(T)=ɛ0 T/(Θv+T). The model is shown to fit the experimental data very well at low temperatures. At high temperatures, the model is less accurate. The characteristic temperature Θv depends on the difference between the electron heat capacity coefficients γ1−γ2 of two metals in the thermocouple. The greater the difference, the higher the sensitivity of the thermocouple. Springer Science+Business Media, LLC., 2007 DSC nationallicence emf nationallicence Seebeck effect nationallicence thermocouple nationallicence thermodynamics nationallicence Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/1(2007-10-01), 289-298 1388-6150 90:1<289 2007 90 10973 https://doi.org/10.1007/s10973-006-7925-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7925-3 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Drebushchak V. Institute of Geology and Mineralogy SB RAS, Pr. Ac. Koptyuga 3, 630090, Novosibirsk, Russia aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/1(2007-10-01), 289-298 1388-6150 90:1<289 2007 90 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer