Ye.K. Iordanishvili. “Nuclear Weapons” of Thermoelectricity (Commemorating the 50th Anniversary of Bi2Te3–Sb2Te3 System Development)
O.N. Manik. Comprehensive Approach to Calculating Thermoelectric
Material Parameters. X. Methods of Vibration Theory. Kinematic Coefficients
and their Calculation Using Molecular Models
A method has been developed for calculating dynamic matrix elements
by dividing it into dynamic and kinematic components which provided a possibility
to make appropriate calculations under “natural” coordinates with regard
to chemical bond nature. The method has been used for calculating kinematic
coefficients in CdSb crystals
A.A. Ashcheulov, V.A. Bezulik. On the Possibility of Control Over
Thermopower Anisotropy Value of Cadmium Antimonide Based Materials
The possibility of irreversible control of the value of thermoEMF
anisotropy of cadmium antimonide single crystals under room temperatures
by means of exposure to magnetic and electronic fields has been shown
V.S. Zakordonets, M. Ye. Chainyuk, V.A. Stephansky. The Influence
of Carrier Zone Spectrum Non-Parabolicity on the Thermopower of Hot Electrons
in Semiconducnors Under Electron-Phonon Drag
A study is made of the thermopower of hot electrons in degenerate
semiconductors in the internal heating stationary electric field under
electron-phonon drag. It is shown that under strong electron spectrum non-parabolicity
thermoelectric field changes its sign with respect to thermoelectric field
in the parabolic case. It is shown that drag thermopower contains terms
proportional to (m2(e)/m(e))2 which allows to expect that its value is
considerably affected by the non-parabolicity. It is shown that as a result
of electron-phonon drag the expression for full thermopower acquires an
additional term which is proportional to phonon temperature gradient.
V.Ya. Mikhailovsky. Power Characteristics of Fuel Combustion Process in Catalytic Heat Sources for Thermoelectric Generators.
F. Skoropad, B. Stadnyk. Radiometer Sensor Bas on the Thermocouple
from Amorphous Metal Alloys
In the given work the paths of construction optimisation of sensor
of radiometers are analysed. The main attention is given to a receiver
of radiation from batteries of thermocouples and optimum choice of their
electrodes. In an outcome of researches the expediency and perspective
use. Of amorphous metallic alloys for sensor creation, in particular, on
basis of the thermocouple Fe40Ni40P14B6–Fe80Cu3B17 is shown. The given
thermocouple is so prepared what in a range of variations of temperature
of an environment its target signal practically does not vary. The decrease
of dependence of a target signal and the cover temperature an of radiometer
enables to improve his metrological and operating performances.
A.A. Ascheulov, I.V. Gutsul, A.I. Rarenko. On the Possibilities of
Electric Current, Voltage and Power Comparisons by a Lateral Thermo-EMF
Designs of anisotropic thermal converters for high-precision measurement
of existing values of alternating currents, voltages and powers over a
wide frequency range have been presented.
J.G. Vian, D. Astrain, J.J. Aguas. Thermoelectric Equipment to Keep
Laboratory Test-Tube at a Controled Temperature
This work is focused in the use of the thermoelectricity for design,
construction and testing of a prototype that make possible heat and cold
production with a accurate temperature control (+/- 0.2 K). This prototype
is often used in the laboratories to keep at a controlled temperature in
the test-tubes. The control temperature accurate of this device is higer
than the convectional device used in the heat and cold production.
L.I. Anatychuk, L.Ya. Kushnerik. Thermoelectric Devices for Medicine
NEWS. IXth International Forum on Thermoelectricity
O.N.Manyk. Comprehensive Approach to Thermoelectric Material Parameters
CalculatingVIII. Methods of Continuum Theory. Approximation of the Isotropic
Medium Closest to the Crystal Under Investigation
The methods of approximation of the isotropic medium closest to
the crystal under investigation have been generalized for the case of low-symmetry
structures, when elastic modulus tensor is arbitrarily assigned in matrix
form. The basic invariants of elastic modulus tensor for rhombic crystals
have been found. Parameters of the isotropic medium closest to the case
considered have been determined. The results have been applied for the
calculation of phase velocities and elastic wave displacements in CdSb
crystals
O.N.Manyk. Comprehensive Approach to Thermoelectric Material Parameters
CalculatingIX. Methods of Microscopic Theory. Force Matrices
A method has been developed for calculating force matrices in microscopic
theory of low-symmetry crystals. Based on the results obtained, the relationships
between force matrices and crystal elastic constants have been determined.
Numerical values of bond elasticities corresponding to nonequivalent hybrid
orbitals in CdSb have been found.
M.Domínguez, D.García, J.Esarte,
D.Astrain, J. González. Possibilities of Efficiency Improvement
in the Thermoelectrics Systems
It is analysed the possible efficiency increase of the refrigeration
facilities that use the thermoelectricity. Different systems to determine
the refrigerating effects are checked: theoretical equations, finite elements
and a new tool developed by us based on the electric analogy run by computer.
It is described the new method of calculus called "Electric Analogy Run
by Computer (AERO)", which allows the study of heat transfer problems included
the change of phase. Once the method has been checked, it is used to see
the importance of the heat transfer systems included in this kind of facilities
which can get efficiencies similar to or higher than others.
F.Skoropad, B.Stadnyk. The Physical Aspects of the Influence of
Elastic-Deformated Condition on Thermo-e.m.f.
Y.S.Budzhak, A.I.Rarenko. Seebeck Effect in the Quantizing Magnetic
Field
The paper is deals with the investigation of Seebeck coefficient
in the classic strong and quantizing fields, which gives a possibility
to study electron dispersion structure for charge carriers in the crystals
experimentally.
V.S.Zakordonets, V.A. Stephansky, M.Ye.Chainyuk. The Influence of
Electron-Phonon Drag on Thermoelectric Figure of Merit of Limited-Sized
Semiconductors
The figure of merit of monopolar nondegenerate semiconductor materials
has been theoretically investigated with regard for the electron-phonon
drag. It has been shown that with decreasing sample linear dimensions thermoelectric
figure of merit will increase reaching its maximum in the submicron-sized
samples. The most preferable here is dissipation of carriers on polarization
potential of acoustic phonons. It has been shown that in the presence of
a strong electron-phonon drag the figure of merit of limited-sized thermoelectric
samples can exceed essentially the figure of merit of the appropriate massive
samples
A.G.Shaiko-Shaikovsky. Procedure for Improvement of Operating Reliability
and Quality of Thermoelements Used in Thermoelectric Coolers Assembly
Procedure for justified presetting of tolerance zone limits has
been proposed for thermoelement geometric parameters in cases when the
distribution of probability density in studied parameters has a complex
multi-modal character. The procedure allows to increase the thermoelectric
products quality and operating reliability, to reduce their cost production.
The procedure can be used for product arbitrary parameters control.
D.M.Freik, A.V.Lisak, V.M.Chobanyuk, R.I.Zapukhlyak. The Influence
of Isochronous Annealing of p-PbTe Thin Films in Vacuum on Their Thermoelectric
Properties
The influence of isochronous annealing of p-PbTe thin films in vacuum
on their thermoelectric properties is investigated. High thermopower values
and improved thermoelectric figure of merit are established. Experimental
results are accounted for by the ambipolar diffusion of positively charged
tellurium vacancies and electrons deep into the films and the formation
of a two-layer p-n structure.
A.A.Ashcheulov, I.V.Gutsul, S.F.Marenkin, V.I.Triphonov, V.Ya.Shevchenko.
Absolute Thermoelectric Receiver for Measuring UHF-Power of the Submillimeter
and Millimeter Wavelength Ranges
The paper deals with the construction and characteristics of absolute
anisotropic thermoelectric receiver based on the anisotropic thermoelements
designed to measure the average value of modulated and nonmodulated radiation
of the submillimeter and millimeter wavelength ranges.
S.O.Filin, V.Yu. Zadiraka. Problems of the Methodology of Designing and Testing Domestic Thermoelectric Refrigerators
A.A.Ashcheulov, L.Ya.Kushneryk. Anisotropic Sensor for Medico-Biological Investigations