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Unique properties of nanostructure materials for low-temperature thermophotoemission converters of energy


Presented by theG. V. Kurdyumov Institute for Metal Physics, N.A.S. of Ukraine.

Authors: Ph.D. Anikeyev V.V., Sydorchenko I.M.


The aim of the series of works is to involve both the new approaches to the materials selection and the conditions for their synthesis, as well as new principles for their use, which allows to improve the technical characteristics of thermal- and photoemission devices based on new materials compared to traditional ones, in particular, to significantly reduce the emitter temperature (less than 800ºC) at thermoemission conversion of thermal energy.

On the base of theoretical and experimental studies, the authors found that obtained samples, such as carbon-containing nanocomposites based on metals and polymers, due to their unique electronic properties open up a wide perspective of using such materials in instruments and systems in the field of power-efficient and resource-saving technologies of innovative energy, including alternative energy.

The ways to solve the problems of searching, creating and certifying perspective carbon nanostructure materials and their composites for low-temperature thermophotoemission energy converters were proposed. The original methods, including electron-positron annihilation one, for determining and controlling of such materials imperfection, parameters of their electronic structure and mechanisms of influence of these parameters on the electrophysical properties of mentioned systems are implemented.

In comparison with world analogues, the laser pulse energy at which electron emission begins, for the LaNi5–carbon nanotubes (CNTs) composite is significantly smaller than for traditional cathodes from refractory metals (with operating temperatures around 1800ºС).It means, that CNTs and their composites are more efficient electron emitters than traditional cathodes from refractory metals, which opens up perspectives for creating low-temperature emitters for direct thermal energy converters with operating temperatures that less than 800ºC.

The economic effect because of implementation of low-temperature cathodes in a new type of thermoemission converters (TECs) is connected with both the growth of TECs efficiency and the increase of efficiency of traditional power generating stations due to utilizing ejected heat by means of it thermoemission conversion to electrical energy. A new type of cathodes for TEP promotes implementation of them in other areas of industry, such as metallurgy, where thermal energy of burned fuel is also not fully used. In addition, a more complete use of the fuel energy helps to minimize thermal and chemical pollutions of the environment and reduce the consumption of fuel from nonrenewable sources.

Total number of publications is 43, including 37 ones with subject concerned to the present work: 15 articles and 22 abstracts of reports.