Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2021. No. 3
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Full text in Russian (pdf)

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DOI https://doi.org/10.30898/1684-1719.2021.3.13

UDC 537.874; 537.624

 

Application of decomposition method for calculation of electrical conductivity of shungite based on the electron-microscopic cards of carbon distribution

 

I. V. Antonets 1, E. A. Golubev 2, V. G. Shavrov3 , V. I. Shcheglov 3

Syktyvkar State University, Oktyabrskiy prosp. 55, Syktyvkar 167001, Russia

2 Geology Institute Komy SC UrD RAS, Pervomaiskaya 54, Syktyvkar 167982, Russia

Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Mokhovaya 11-7, Moscow 125009, Russia

 

The paper was received on March 19, 2021

 

Abstract. The outlook of using the shungite for covering large area which can protect something from electromagnetic radiation is described. As a main parameter which determines the efficiency of created screens is determined the specific electrical conductivity of shungite carbon. For the measuring of conductivity it is proposed to use the high-resolution raster electron microscopy which make be possible to obtain the card of carbon distribution in the scale of some nanometers. The method of binarization of this card is proposed. This binare card describes the spatial distribution of two phases large-conducting and small-conducting. The large-conducting phase consist of graphene slides. The small-conducting phase consist of chaotic distributed atoms of carbon. On the basis of binare card it is constructed the flat-area block which is looked as net from square cells having two colours black and white which correspond one by one to large and small-conducting phases. On the area of block it is selected tubes of current which consist of straight chains of black and white cells connected in succession. The whole resistance of block is determined by parallel connection of these tubes. It is proposed the procedure of constructing this symmetrical block along two coordinates. The scheme of this construction is proposed. The calculation of block resistivity along two coordinates is executed. On the basis of flat-area block it is constructed the space elementary block which has equal to each other resistance along three coordinates. For the determination of specific resistance of material as a whole it is carried out the procedure of decomposition which consist of presentation the unit volume of specimen as a set of elementary blocks. For the real specimens of shungite from two natural deposits it is made the calculation of specific resistance and specific conductivity of shungite carbon. It is established that the calculated data are coincide with data received by contact method in the accuracy of 30%. As a most advantage of proposed method it is established the possibility of conductivity measuring of carbon part of shungite in the scale of some units of nanometers.

Key words: carbon, shungite, electro-conductivity.

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For citation:

Antonets I.V., Golubev E.A., Shavrov V.G., Shcheglov V.I. Application of decomposition method for calculation of electrical conductivity of shungite based on the electron-microscopic cards of carbon distribution. Zhurnal Radioelektroniki [Journal of Radio Electronics]. 2021. No.3. https://doi.org/10.30898/1684-1719.2021.3.13. (In Russian)