Влияние Добавок Шунгита На Электрический Пробой Перхлората Аммония

Савенков, Г.Г.; Морозов, В.А.; Украинцева, Т.В.; Кац, В.М.; Зегря, Г.Г.; Илюшин, М.А.

doi:10.21883/pjtf.2019.19.48318.17847

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…Методом Составляющий основу шунгита углерод обладает высокой электрической проводимостью, поэтому важнейшим практическим применением шунгита является создание покрытий, надежно экранирующих электромагнитное излучение. Поглощающие, пропускающие и отражающие свойства шунгита рассмотрены в работах [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Основные электродинамические свойства шунгита обусловлены структурой и содержанием входящего в него углерода.…”

Section: аннотацияunclassified

Application of trinary discretization method for structural distribution analysis of carbon in graphene-contained shungite

Antonets,

Golubev,

Shavrov

et al. 2023

JRE

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Using the high-permission raster electron microscopy on nano-level the structure distribution of carbon in natural graphene-containing shungite applied for manufacturing adsorbing surfaces is investigated. The analysis is executed in specimens with specific carbon containing about 80-97% and specific conductivity from 2200 to 8600 Sm/m. The results of measuring were the cards of carbon distribution along the specimen surface. It was investigated four specimens and in each specimen was copied five cards in different its points, as a result – twenty cards. It is found the presence on the cards the graphene packets and long graphene ribbons and also domains without clear graphene-similar structure. For the analysis of local carbon distribution, it is proposed the discretization method which consist of applying on the card plane the grid with square cells and following analysis of regularity graphene layers by each cell. It is found three levels of structure regularization: high, middle and low. For the high level it is typical the regular periodic distribution of graphene layers along the whole square of cell, for middle – explosive character of graphene layers, for low – absence of graphene layers along the whole cell. For individual characteristics of each specimen, it is proposed the concept of order degree which supposed the relative number cells in three levels which is averaged on all its cards. It is found that in typical case the high degree of order presents on 35,4% of card area, middle in 47,3% and low in 17,3% of the same area. By way of possible course of distinction in order level is proposed the specific geological origin of specimens from different depositions.

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Section: аннотацияunclassified

Application of trinary discretization method for structural distribution analysis of carbon in graphene-contained shungite

Antonets,

Golubev,

Shavrov

et al. 2023

JRE

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show abstract

“…Надежные экраны получаются как для низкочастотного излучения, так и для СВЧ диапазонов вплоть до десятков ГГц [5][6][7][8][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionunclassified

The influence of carbon component structure of graphene containing shungite on its electrical conductivity.

Антонец¹,

Голубев²,

Шавров³

et al. 2021

JRE

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The investigation of the influence of carbon component structure of graphene containing shungite on its electrical conductivity is carried out. Five shungite samples from three different deposits with the same carbon content equal to 97% were selected as the object of research. It is established that the integral conductivity of specimens which is measured by four-contact method is changed in frames from 600 Sm/m to 2500 Sm/m. For the interpretation of so large scattering of data by equal concentration it was undertaken the investigation of carbon component structure on nano-level which was made by method of high-distinguish raster electron microscopy. By this method on the microscopic section of these specimens was obtained the cards of surface distribution of graphene slides and graphene packets. For the analysis of conductivity of specimens on the basis of these cards it was employed the method of independent channels. This method employs the presentation of specimen as a combination from parallel current-leading channels with following distribution of channel to cubic space blocks. The successive connection of blocks with accounting of slides orientation determines the total resistance of each channel and the parallel connections of all channels determines the specific conductivity of specimen as a whole. For the obtaining the quantity characteristics the whole card was distributed to some more small regions – fields. In this case the obtained results are averaged by the whole square of card. For the analysis of the field the method of square discretization was used. By this method the whole field id distributed to individual squares which dimension is near to the dimension of graphene packet. It was established that the character of structure in each square has two variants: first when the slides of graphene has clear determined spatial orientation ant the second when special orientation is absent and by orientation the squares are neutral. It is made the quantity analysis of neutral squares along the all specimens. It is shown that the normalized quantity of neutral squares is straight proportional to specific conductivity of specimen. The analysis of slides graphene orientation in squares with clear determined spatial orientation is carried out. For investigation of space structure of channel, the square was identified with lateral projection of block along two coordinates. The dependence of block resistance from the slide orientation is found. It is shown that the block resistance by the flowing of current across the graphene slides is more than order exceeds the resistance by the flowing of current along the slides of graphene. It is shown that the most role in formation of channel resistance play the blocks which graphene slides are oriented across the current flowing. By the adding of channels along the structure of volume unit it was founded the specific conductivity of specimen as a whole. It is established that the obtained meanings of conductivity for all specimens exceed the obtained by contact method on several times. As a reason of this exceeding it is established the absence of accounting the influence of enough small conductivity of intervals between slides and packets and also the absence of accounting of incomplete filling of squares by periodic structures. It is shown that the optimal in plane of correspondence to experiment is the introduce the normalization coefficient of conductivity of intervals which is equal to 0,2222. For the accounting of incomplete filling of squares by periodic structures it was carried out the binary discretization of most typical blocks with the resolution near 0,2 nm which is near the thickness of graphene slide. Along the obtained selection there was the averaged coefficients of filling of carbon which are equal from 0,10 to 0,15 parts for the whole volume of blocks. With the normalized conductivity of intervals and coefficients of filling of blocks it was found the integral conductivity for all specimens. It is shown that the obtained values are near the measured by contact method in the precision not more than 37%. In brief it is discussed the quality reason of apparent paradoxical increasing of integral conductivity by decreasing on structural character of carbon. It is established that the main reason of this increasing is the decreasing of contribution of graphene slides having large resistance which are oriented across the flowing of current.

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“…Значительная электрическая проводимость углерода, составляющего основу шунгита, обеспечивает возможность создания крайне дешевых и в то же время высокоэффективных электрических экранов, надежно поглощающих электромагнитное излучение в широком диапазоне частот [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

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Application of three-level discretization method for analysis connection between structure and specific conductivity of graphene-contained shungite

Antonets,

Golubev,

Shavrov

et al. 2023

JRE

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The correlation between structure configuration of carbon distribution of graphene-contained shungite and its specific electrical conductivity is investigated. The four shungite specimens from different natural depositions are investigated. The carbon structure configuration is investigated by high-permission raster electron microscopy. As a result, there was found cards of graphene layers, graphene packets and graphene ribbons along the plane of specimen surface. The specific electrical conductivity was merit be the four-contact method. On each specimen was found five cards in different its points as a whole – twenty cards. For the analysis of carbon local distribution, the descretization by three levels method was used. This method consists of applying on the card plane the grid with square cells and following analysis of regularity graphene layers by each cell. It is found three levels of order regularity structure: high, middle and low which distinguished by the number and length of graphene layers inside of cell. By averaging along all cards of present specimen for each specimen was found the own numerical characteristic which describes the carbon distribution structure. As a most important parameters were selected the averaged meaning of order degree and inversed value of square deflection from this value. It was found that the dependence of inverted value on specimen from the specimen number has the same character as the dependence on specific conductivity form the same number. As a result of investigations, it was proposed that the specific conductivity of shungite specimen may be found from statistical analysis of carbon space distribution cards which are found by the high-permission raster electron microscopy. It was proposed the algorithm of founding conductivity by analysis carbon configuration cards consisted from 16 successive steps which started from the founding the total combination of cards with the aid of electron microscope and finished by obtaining the electric conductivity value.

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Влияние Добавок Шунгита На Электрический Пробой Перхлората Аммония

Cited by 3 publications

References 3 publications

Application of trinary discretization method for structural distribution analysis of carbon in graphene-contained shungite

Application of trinary discretization method for structural distribution analysis of carbon in graphene-contained shungite

The influence of carbon component structure of graphene containing shungite on its electrical conductivity.

Application of three-level discretization method for analysis connection between structure and specific conductivity of graphene-contained shungite

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