Macroscopic thermoelectric efficiency of carbon nanocomposites

Eidelman, E. D.; Meilakhs, A. P.

doi:10.17586/2220-8054-2016-7-6-919-924

Cited by 7 publications

(11 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A new method for calculating the Kapitza conductance was proposed. Matching equations for the phonon-distribution functions are introduced, which, together with the Boltzmann equations for phonons and some additional equations, form a complete system of Equation (2,3,5,6) describing the kinetics of heat transfer across the boundary by phonons. A method of solution to such a system was introduced.…”

Section: Discussionmentioning

confidence: 99%

“…So distribution functions n L ¼ n R ¼ n 0 ðTÞ À τv x ∂n 0 ∂T q κ are solutions of the system of Equation (2,3,5,6) with the transmission and reflection amplitudes defined by conditions (7).…”

Section: System Of Equationsmentioning

confidence: 99%

“…Now that we derived a set of equations describing phonon-kinetics at the interface in a general form, we want to formulate a specific model, i.e., a set of parameters which we want to substitute into Equation (2,3,5,6).…”

Section: Modelmentioning

confidence: 99%

“…To finally find the distribution functions of phonons near the boundary, we substitute (24,25) into Equation (5,6) and obtain a system of three equations with three unknowns. We use…”

Section: For Incident Phonons V Lmentioning

confidence: 99%

“…[1] The inverse value called Kapitza conductance is also widely used. Investigation of the Kapitza resistance effect has attracted a lot of attention in recent years as it is essential for the optimization of heat management of many applied systems including nanostructured materials for heat sinks, [2,3] nanofluids, [4,5] thermoelectric generators, [6,7] and nanoelectronics. [8,9] Two most important models for the analytical description of heat transport through an interface are acoustic mismatch model (AMM) and diffuse mismatch model (DMM).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Calculation of Kapitza Resistance with Kinetic Equation

Meilakhs

Semak

2021

Physica Status Solidi (b)

View full text Add to dashboard Cite

A new method for the calculation of interfacial thermal resistance in the case of heat transport through the interface by phonons is introduced herein. The novelty of the suggested approach consists of the consideration of all the consequences of a nonequilibrium character of phonon‐distribution functions during heat transfer. The well‐described diffuse mismatch model is used to introduce a model set of transmission and reflection amplitudes of phonons at the interface. An exact analytical solution for the proposed model is derived. Finally, the problem is solved for a set of transmission and reflection amplitudes characterized by a free parameter.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: System Of Equationsmentioning

confidence: 99%

Section: Modelmentioning

confidence: 99%

“…To finally find the distribution functions of phonons near the boundary, we substitute (24,25) into Equation (5,6) and obtain a system of three equations with three unknowns. We use…”

Section: For Incident Phonons V Lmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Calculation of Kapitza Resistance with Kinetic Equation

Meilakhs

Semak

2021

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

Thermoelectric generator based on composites obtained by sintering of detonation nanodiamonds

Eidelman

Meilakhs

Semak

et al. 2017

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

A model of a thermoelectric generator is proposed, in which composite materials obtained by sintering diamond nanoparticles are used as the main component. To increase the useful conversion of heat into electric current, it is proposed to use the effect of electron drag by ballistic phonons. To reduce the ineffective heat spread, it is proposed to use the effect of thermal resistance of the boundaries between the graphite-like and diamond-like phases of the composite. An experimental confirmation of the existence of an optimal volume ratio between graphite-like and diamond-like phases of the composite is predicted and obtained. The highest achieved value of thermoelectric coefficient in the actual structure is 80 µV K−1 (which means 20 times increase compared to that of composites not of the optimal structure), with a thermal conductivity of 50 W m−1 K−1. These results were obtained with constant electrical conductivity. The combined influence of these two effects in case of the ideal composite structure should result in an increase of the thermoelectric efficiency parameter by three orders of magnitude.

show abstract

Electronic Kapitza conductance and related kinetic coefficients at an interface between n-type semiconductors

Meilakhs

2023

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

We calculate the Kapitza conductance, which is the proportionality coefficient between heat flux and temperature jump at the interface,for the case of two conducting solids separated by the interface. We show that for conducting solids in a non-equilibrium state, thereshould also arise the electrochemical potential jump at the interface. Hence to describe linear transport at the interface we need threekinetic coefficients: interfacial analogs of electric and heat conductances and interfacial analog of the Seebeck coefficient. We calculate these coefficients for the case of an interface between n-type semiconductors. We perform calculations in the framework of Boltzmann transport theory. We have found out that the interfacial analog of the Seebeck coefficient for some range of parameters of the considered semiconductors, has a high value of about 10-3 V/K. Thus this effect has the potential to be used for the synthesis of effective thermoelectric materials.

show abstract

Macroscopic thermoelectric efficiency of carbon nanocomposites

Cited by 7 publications

References 24 publications

Calculation of Kapitza Resistance with Kinetic Equation

Calculation of Kapitza Resistance with Kinetic Equation

Thermoelectric generator based on composites obtained by sintering of detonation nanodiamonds

Electronic Kapitza conductance and related kinetic coefficients at an interface between n-type semiconductors

Contact Info

Product

Resources

About